Although it provides a useful description of elementary movement trajectories, we argue that the delta-lognormal model is deficient as an account of speed/accuracy tradeoffs in aimed movements. It fails in this regard because (1) it is deterministic, (2) its formulation ignores critical task elements, and (3) it fails to account for the corrective role of submovements.

BackgroundCoaching is increasingly viewed as a dyadic exchange of verbal and non-verbal interactions driving clients' progress. Yet, little is known about how the trajectory of dyadic interactions plays out in workplace coaching.MethodThis paper provides a multiple-step exploratory investigation of movement synchrony of dyads in workplace coaching. We analyzed a publicly available dataset of 173 video-taped dyads. Specifically, we averaged MS per session/dyad to explore the temporal patterns of MS across the cluster of dyads that completed 10 sessions, and (...) a set of 173 dyadic interactions with a varied number of sessions. Additionally, we linked that pattern to several demographic predictors. The results indicate a differential downward trend of MS.ResultsDemographic factors do not predict best fitting MS curve types, and only client age and coach experience show a small but significant correlation.DiscussionWe provide contextualized interpretations of these findings and propose conceptual considerations and recommendations for future coaching process research and practice. (shrink)

Human motor skills are exceptional compared to other species, no less than their cognitive skills. In this perspective paper, we suggest that “movement matters!,” implying that motor development is a crucial driving force of cognitive development, much more impactful than previously acknowledged. Thus, we argue that to fully understand and explain developmental changes, it is necessary to consider the interaction of motor and cognitive skills. We exemplify this argument by introducing the concept of “embodied planning,” which takes an embodied (...) cognition perspective on planning development throughout childhood. From this integrated, comprehensive framework, we present a novel climbing paradigm as the ideal testbed to explore the development of embodied planning in childhood and across the lifespan. Finally, we outline future research directions and discuss practical applications of the work on developmental embodied planning for robotics, sports, and education. (shrink)

Sequential action makes up the bulk of human daily activity, and yet much remains unknown about how people learn such actions. In one motor learning paradigm, the serial reaction time (SRT) task, people are taught a consistent sequence of button presses by cueing them with the next target response. However, the SRT task only records keypress response times to a cued target, and thus it cannot reveal the full time‐course of motion, including predictive movements. This paper describes a mouse (...) class='Hi'>movement trajectory SRT task in which the cursor must be moved to a cued location. We replicated keypress SRT results, but also found that predictive movement—before the next cue appears—increased during the experiment. Moreover, trajectory analyses revealed that people developed a centering strategy under uncertainty. In a second experiment, we made prediction explicit, no longer cueing targets. Thus, participants had to explore the response alternatives and learn via reinforcement, receiving rewards and penalties for correct and incorrect actions, respectively. Participants were not told whether the sequence of stimuli was deterministic, nor if it would repeat, nor how long it was. Given the difficulty of the task, it is unsurprising that some learners performed poorly. However, many learners performed remarkably well, and some acquired the full 10‐item sequence within 10 repetitions. Comparing the high‐ and low‐performers’ detailed results in this reinforcement learning (RL) task with the first experiment's cued trajectory SRT task, we found similarities between the two tasks, suggesting that the effects in Experiment 1 are due to predictive, rather than reactive processes. Finally, we found that two standard model‐free reinforcement learning models fit the high‐performing participants, while the four low‐performing participants provide better fit with a simple negative recency bias model. (shrink)

Current models of speech motor control rely on either trajectory-based control (DIVA, GEPPETO, ACT) or a dynamical systems approach based on feedback control (Task Dynamics, FACTS). While both approaches have provided insights into the speech motor system, it is difficult to connect these findings across models given the distinct theoretical and computational bases of the two approaches. We propose a new extension of the most widely used dynamical systems approach, Task Dynamics, that incorporates many of the strengths of (...) class='Hi'>trajectory-based approaches, providing a way to bridge the theoretical divide between what have been two separate approaches to understanding speech motor control. The Task Dynamics (TD) model posits that speech gestures are governed by point attractor dynamics consistent with a critically damped harmonic oscillator. Kinematic trajectories associated with such gestures should therefore be consistent with a second-order dynamical system, possibly modified by blending with temporally overlapping gestures or altering oscillator parameters. This account of observed kinematics is powerful and theoretically appealing, but may be insufficient to account for deviations from predicted kinematics – i.e., changes produced in response to some external perturbations to the jaw, changes in control during acquisition and development, or effects of word/syllable frequency. Optimization, such as would be needed to minimize articulatory effort, is also incompatible with the current TD model, though the idea that the speech production systems economizes effort has a long history and, importantly, also plays a critical role in current theories of domain-general human motor control. To address these issues, we use Dynamic Movement Primitives (DMPs) to expand a dynamical systems framework for speech motor control to allow modification of kinematic trajectories by incorporating a simple, learnable forcing term into existing point attractor dynamics. We show that integration of DMPs with task- based point-attractor dynamics enhances the potential explanatory power of TD in a number of critical ways, including the ability to account for external forces in planning and optimizing both kinematic and dynamic movement costs. At the same time, this approach preserves the successes of Task Dynamics in handling multi-gesture planning and coordination. (shrink)

Sequential action makes up the bulk of human daily activity, and yet much remains unknown about how people learn such actions. In one motor learning paradigm, the serial reaction time (SRT) task, people are taught a consistent sequence of button presses by cueing them with the next target response. However, the SRT task only records keypress response times to a cued target, and thus it cannot reveal the full time‐course of motion, including predictive movements. This paper describes a mouse (...) class='Hi'>movement trajectory SRT task in which the cursor must be moved to a cued location. We replicated keypress SRT results, but also found that predictive movement—before the next cue appears—increased during the experiment. Moreover, trajectory analyses revealed that people developed a centering strategy under uncertainty. In a second experiment, we made prediction explicit, no longer cueing targets. Thus, participants had to explore the response alternatives and learn via reinforcement, receiving rewards and penalties for correct and incorrect actions, respectively. Participants were not told whether the sequence of stimuli was deterministic, nor if it would repeat, nor how long it was. Given the difficulty of the task, it is unsurprising that some learners performed poorly. However, many learners performed remarkably well, and some acquired the full 10‐item sequence within 10 repetitions. Comparing the high‐ and low‐performers’ detailed results in this reinforcement learning (RL) task with the first experiment's cued trajectory SRT task, we found similarities between the two tasks, suggesting that the effects in Experiment 1 are due to predictive, rather than reactive processes. Finally, we found that two standard model‐free reinforcement learning models fit the high‐performing participants, while the four low‐performing participants provide better fit with a simple negative recency bias model. (shrink)

The study focuses on the conceptual development of Latin American revolutionary thought, capturing the trajectory in the formulation of revolutionary ideals along the evolutionary axis from independence to socialism. The aim of the study is to grasp and explain the evolution of revolutionary ideals in order to demonstrate the broader context of current social processes in Latin America through a historical-philosophical analysis of the ideological basis of social movements in the region. An analysis of the ideological contexts captured in (...) the continuity of historical development, which affected the shaping and nature of the current transformation processes, may facilitate our understanding of the broader context of the articulated need for social change in the Latin American setting as well as of the current societal challenges pertinent to social change and innovation on a global scale. (shrink)

This article argues that democratic deepening is shaped by shifting civil society-state relations that can only be understood by disaggregating democratic deepening into its component parts of participation, representation, and stateness. This frame is used to explore the divergent democratic trajectories of Brazil, India, and South Africa. Through the examples of local government transformation and social movement mobilization, I argue that a “project” civil society in Brazil has deepened democracy and transformed the state. In contrast, in South Africa and (...) India civil society is increasingly being subordinated to political society. In South Africa, an active civil society has largely been sidelined as a politically consequential actor (containerization) and in India much of civil society has been fragmented and instrumentalized (involution). (shrink)

The automatic tendency to anthropomorphize our interaction partners and make use of experience acquired in earlier interaction scenarios leads to the suggestion that social interaction with humanoid robots is more pleasant and intuitive than that with industrial robots. An objective method applied to evaluate the quality of human–robot interaction is based on the phenomenon of motor interference (MI). It claims that a face-to-face observation of a different (incongruent) movement of another individual leads to a higher variance in one’s own (...) movement trajectory. In social interaction, MI is a consequence of the tendency to imitate the movement of other individuals and goes along with mutual rapport, sense of togetherness, and sympathy. Although MI occurs while observing a human agent, it disappears in case of an industrial robot moving with piecewise constant velocity. Using a robot with human-like appearance, a recent study revealed that its movements led to MI, only if they were based on human prerecording (biological velocity), but not on constant (artificial) velocity profile. However, it remained unclear, which aspects of the human prerecorded movement triggered MI: biological velocity profile or variability in movement trajectory. To investigate this issue, we applied a quasi-biological minimum-jerk velocity profile (excluding variability in the movement trajectory as an influencing factor of MI) to motion of a humanoid robot, which was observed by subjects performing congruent or incongruent arm movements. The increase in variability in subjects’ movements occurred both for the observation of a human agent and for the robot performing incongruent movements, suggesting that an artificial human-like movement velocity profile is sufficient to facilitate the perception of humanoid robots as interaction partners. (shrink)

Though capable of reproducing experimentally observed velocity profiles, the model proposed by Plamondon & Alimi (P&A) does not provide a viable theoretical framework for the understanding of trajectory formation and speed/accuracy trade-offs. The issues of variation and stability can be better understood by considering movement as resulting from an underlying dynamic rather than from an impulse-response of the system.

This article proposes a neo-Polanyian theoretical framework for understanding the dynamics within contemporary market societies. It uses this framework to analyze the divergence between the United States and other developed societies that has become more pronounced in the first years of the twenty-first century. The argument emphasizes the shifting political alliances of the business community in the United States and suggests that from 1994 onward, business lost power in the right-wing coalition to its religious Right allies. The growing power of (...) a religious-based social movement is a critical ingredient in the unilateralist turn in the Bush Administration’s foreign policy. (shrink)

This article discusses an approach to characterizing movement patterns (paths/trajectories) of individual agents that allows for relating aspects of cognitive conceptualization of movement patterns with formal spatial characterizations. To this end, we adopt a perspective of characterizing movement patterns on the basis of perceptual and conceptual invariants that we term movement choremes (MCs). MCs are formally grounded by behaviorally validating qualitative spatio-temporal calculi. Relating perceptual and cognitive aspects of space and formal theories of spatial information has (...) shown promise to foster understanding of the semantics of movement patterns. Specifically, we discuss our approach in relation to existing qualitative formalisms such as the region connection calculus and the Egenhofer’s intersection formalisms. We show that the MC approach is compatible with these approaches but offers additional opportunities to improve the cognitive adequacy of these formalisms. We summarize this paper using a movement taxonomy that also provides guidance for future research. (shrink)

Which modernism or modernisms circulate in Deleuze’s two-volume work on cinema? Can one meaningfully claim that both or either The Movement-Image and The Time-Image maintain connections with literary modernism? What relationship if any may be forged between theoretical debates in the areas of literary and film studies as these have been influenced by engagement with Deleuze’s work on cinema? The first obstacle to any successful negotiation of these questions lies in the absence in the books of any reference to (...) the category of modernism – a fact which is after all hardly surprising in a French author of Deleuze’s generation. A second consideration is summed up well by Joost Raessens when he argues that “For Deleuze the term ‘modernity’ is not a neutral category. In effect modern cinema is a representation of differential thought which is determined [...] as a fundamental critique of the classic thought of Plato and Hegel.” Scholars often assert that Deleuze’s modernity owes much to Nietzsche, in the shape of the latter’s demand for a new approach to questions of truth and knowledge. Once life is no longer judged in the name of a higher authority such as the good or the true, the stage is set for Nietzschean transvaluation. This is a process which subjects “every being, every action and passion, even every value, in relation to the life which they involve” to evaluation. This normative model of a cinema which has the capacity to carry out a Nietzschean total critique by means other than philosophy presides over The Time-Image in particular. In terms of the trajectory of Deleuze’s thought, total critique is opposed, in Nietzsche and Philosophy and Difference and Repetition, to Kantian critique as well as to Hegelian sublation. The thinking images of modern cinema, more specifically of its preeminent auteurs in Deleuze’s pantheon such as Welles, Resnais, Godard, and others, can effectuate this new image of thought. Thus is rendered tangible Deleuze’s claim that films think, that cinema thinks. Thus are linked a modernism of cinema and a project which dates back to Difference and Repetition, namely the challenge to a certain image of thought. In this challenge the allies include the two philosophers who dominate the film books – Bergson and Nietzsche. This chapter assumes the position that it is impossible to consider Deleuze’s modernism as being in any way other than intrinsically linked to his overall philosophical system and therefore that it is only in this context that connections with literary modernism can be explored. (shrink)

Which modernism or modernisms circulate in Deleuze’s two-volume work on cinema? Can one meaningfully claim that both or either The Movement-Image and The Time-Image maintain connections with literary modernism? What relationship if any may be forged between theoretical debates in the areas of literary and film studies as these have been influenced by engagement with Deleuze’s work on cinema? The first obstacle to any successful negotiation of these questions lies in the absence in the books of any reference to (...) the category of modernism – a fact which is after all hardly surprising in a French author of Deleuze’s generation. A second consideration is summed up well by Joost Raessens when he argues that “For Deleuze the term ‘modernity’ is not a neutral category. In effect modern cinema is a representation of differential thought which is determined [...] as a fundamental critique of the classic thought of Plato and Hegel.” Scholars often assert that Deleuze’s modernity owes much to Nietzsche, in the shape of the latter’s demand for a new approach to questions of truth and knowledge. Once life is no longer judged in the name of a higher authority such as the good or the true, the stage is set for Nietzschean transvaluation. This is a process which subjects “every being, every action and passion, even every value, in relation to the life which they involve” to evaluation. This normative model of a cinema which has the capacity to carry out a Nietzschean total critique by means other than philosophy presides over The Time-Image in particular. In terms of the trajectory of Deleuze’s thought, total critique is opposed, in Nietzsche and Philosophy and Difference and Repetition, to Kantian critique as well as to Hegelian sublation. The thinking images of modern cinema, more specifically of its preeminent auteurs in Deleuze’s pantheon such as Welles, Resnais, Godard, and others, can effectuate this new image of thought. Thus is rendered tangible Deleuze’s claim that films think, that cinema thinks. Thus are linked a modernism of cinema and a project which dates back to Difference and Repetition, namely the challenge to a certain image of thought. In this challenge the allies include the two philosophers who dominate the film books – Bergson and Nietzsche. This chapter assumes the position that it is impossible to consider Deleuze’s modernism as being in any way other than intrinsically linked to his overall philosophical system and therefore that it is only in this context that connections with literary modernism can be explored. (shrink)

This article is an attempt to rethink the interconnectedness between discourse and subjective agency and to highlight methodological approaches to studies of gendering processes as a central part of it. The notions of desire, subjectification and biography are understood as mediated by narratives and metaphors, as a movement between the individual and her contexts. The transformative methodological project suggests conceptual retoolings as new analytic approaches to empirical analysis of the kind that aims to provide complex understanding of subjectification processes (...) in lived life. The empirical field brought into the article as a means of explication deals with university cultures, and more specifically with a case of an assistant professor caught in conflicts between official academic discourses and more subtle political and gendered discourses. The author takes the concepts of desire trajectories, discursive authority, multifaceted discursive realities and past experiences into an analysis of the enacting forces involved in the processes of exclusion that finally ejects the protagonist in the empirical case from the university field. (shrink)

Plamondon & Alimi propose a universal account of trajectory formation and speed/accuracy trade-off in rapid movements but fail, because: (1) the kinematic model ignores the more fundamental dynamics of movement generation, and (2) it does not capture the essential space-time constraints of movement accuracy. Hence, the modeling lacks a biologically and behaviorally principled foundation and is driven by pragmatic function fitting.

The cyberworld fast rolling in and impacting every aspect of human living on the globe today presents an enormous challenge to humankind. It is taken up by the media following current events through to all kinds of natural- and social-scientific discourses. Digitized technoscience develops at a breakneck pace in all areas accompanied by sociological analysis. What is missing is a philosophical response genuinely posing the basic ontological question: What is a digital being's peculiar mode of being? The present study offers (...) a digital ontology that analyzes the dissolution of beings into bit-strings, driven by mathematized science. The mathematization of knowledge reaches back to Pythagoras, Plato and Aristotle, and continues with Descartes, Galileo, Newton, Leibniz. Western knowledge from its inception has always been driven by an unbridled will to efficient-causal power over all kinds of movement and change. This historical trajectory culminates in the universal Turing machine that enables efficient, automated, algorithmic control over the movement of digital beings through the cyberworld. The book fills in the ontological foundations underpinning this brave new cyberworld and interrogates them, especially by questioning the millennia-old conception of 1D-linear time. An alternative ontology of movement arises, based on a radically alternative conception of 3D-time. (shrink)

Although several theories of online syntactic processing assume the parallel activation of multiple syntactic representations, evidence supporting simultaneous activation has been inconclusive. Here, the continuous and non‐ballistic properties of computer mouse movements are exploited, by recording their streaming x, y coordinates to procure evidence regarding parallel versus serial processing. Participants heard structurally ambiguous sentences while viewing scenes with properties either supporting or not supporting the difficult modifier interpretation. The curvatures of the elicited trajectories revealed both an effect of visual context (...) and graded competition between simultaneously active syntactic representations. The results are discussed in the context of 3 major groups of theories within the domain of sentence processing. (shrink)

Although mouse‐tracking has been taken as a real‐time window on different aspects of human decision‐making processes, whether purely semantic information affects response conflict at the level of motor output as measured through mouse movements is still unknown. Here, across two experiments, we investigated the effects of semantic knowledge by predicting participants’ performance in a standard keyboard task and in a mouse‐tracking task through distributional semantics, a usage‐based modeling approach to meaning. In Experiment 1, participants were shown word pairs and were (...) required to perform a two‐alternative forced choice task selecting either the more abstract or the more concrete word, using standard keyboard presses. In Experiment 2, participants performed the same task, yet this time response selection was achieved by moving the computer mouse. Results showed that the involvement of semantic components in the task at hand is observable using both standard reaction times (Experiment 1) as well as using indexes extracted from mouse trajectories (Experiment 2). In particular, mouse trajectories reflected the response conflict and its temporal evolution, with a larger deviation for increasing word semantic relatedness. These findings support the validity of mouse‐tracking as a method to detect deep and implicit decision‐making features. Additionally, by demonstrating that a usage‐based model of meaning can account for the different degrees of cognitive conflict associated with task achievement, these findings testify the impact of the human semantic memory on decision‐making processes. (shrink)

The gradual increase in the density of highway vehicles and traffic flow makes the abnormal driving state of vehicles an indispensable tool for assisting traffic dispatch. Intelligent transportation systems can detect and track vehicles in real time, acquire characteristics such as vehicle traffic, vehicle speed, vehicle flow density, and vehicle trajectory, and further perform advanced tasks such as vehicle trajectory. The detection of abnormal vehicle trajectory is an important content of vehicle trajectory understanding. And the development (...) of the Internet of Things and 5G technology has led to a continuous increase in the rate of data information circulation. The “Internet of Vehicles” generated based on the practice of 5G communication technology constitutes a vehicle abnormal trajectory detection system, which has very high feasibility and safety and stability. Therefore, this research is aimed at the needs of preventing major accidents and forensic analysis during highway vehicles. Based on the integration of the Internet of Things 5G communication technology, a trajectorial anomaly detection of highway vehicle trajectory based on the integration of the Internet of Things 5G is proposed. By accurately sensing unsafe events at the perception layer, network layer, and application layer, the vehicle driving trajectory state is divided into several simple semantic representations. The semantic representation is analyzed, and then the moving target detection and moving target tracking algorithms needed to extract the vehicle trajectory are introduced. Through video detection and tracking of moving vehicle targets, the driving trajectory of the vehicle is obtained, and the movement characteristics of the vehicle in each frame of image are extracted. According to the relationship between the trajectory of the vehicle and the lane line, the vehicle trajectory analysis is realized, and then it is judged whether the vehicle has abnormal trajectory. Compared with the traditional method of manually detecting the driving condition of the vehicle, the abnormal trajectory detection of the vehicle based on the integration of the Internet of Things and 5G can quickly detect the abnormal trajectory of the vehicle in the traffic monitoring video. (shrink)

The present study examined what participants perceive of their hand movements when using a tool. In the experiments different gains for either the x-axis or the y-axis perturbed the relation between hand movements on a digitizer tablet and cursor movements on a display. As a consequence of the perturbation participants drew circles on the display while their covered hand movements followed either vertical or horizontal ellipses on the digitizer tablet. When asked to evaluate their hand movements, participants were extremely uncertain (...) about their trajectories. By varying the amount of visual feedback, findings indicated that the low awareness of one’s own movements originated mainly from an insufficient quality of the humans’ tactile and proprioceptive system or from an insufficient spatial reconstruction of this information in memory. (shrink)

Over time, according to popular and academic accounts, alternative trade initiatives [such as fair trade, organics, forest certification, and socially responsible investing ] almost invariably lose their oppositional stance and go mainstream. That is, they lose their alternative, usually peripheral, and often contrarian character. In this paper, I argue that this is not always the case and that the path to going mainstream is not always an unproblematic one. I observe that while scholars have documented various aspects of specific alternative (...) trade initiatives, little comparative work has been done to theorize their different trajectories. To advance the scholarship, I compare two alternative trade movements, fair trade and SRI, and develop three hypotheses—the relation motivations hypothesis, the material interests hypothesis, and the organization of credibility hypothesis—that explain why going mainstream has been so hotly contested in the fair trade movement but not the SRI movement. I articulate these hypotheses and evaluate their merits. (shrink)

The notion of ‘rhetorical bodies’ argues the cause of the rhetorical elements in the material and the material elements in the rhetorical in ways that can be seen as analogous to the bi-partite modes of Deleuzian film philosophy, ‘movement-image’ and ‘time-image’. Tamil films of the 1940s and 1950s bear the strong imprints of the rhetorical elements of the Self-Respect Movement and Dravidian Movement, which took root in different versions during the 1920s–60s. The narrative locations of the bodies (...) in the Tamil films of the 1940s and 1950s provide interesting theoretical and analytical challenges if one seeks to combine the Deleuzian notions of ‘movement-image’ with the notions of material rhetorics. The coming together of these notions provides new pointers to the understanding of an important phase in the history of Tamil cinema for its implications on the long-running nexus between politics and films in the state of Tamil Nadu. The Deleuzian trajectory in film philosophy provides more than enough pointers to examine early Tamil cinema's attempts to construct ‘movement-images’ through rhetorical bodies. This paper seeks to examine the contexts of ‘movement-images’ and the role of ‘rhetorical bodies’ in constructing the same in Velaikari, scripted by C. N. Annadurai. Popularly known as Aringnar Anna, C. N. Annadurai was the former Chief Minister of Tamil Nadu and the Founder of DMK, the party which unseated Congress from power in Tamil Nadu in 1967, and the state remains out of reach of the national parties ever since. (shrink)

This study compared whole body kinematics of the clean movement when lifting three different loads, implementing two data analysis approaches based on principal component analysis. Nine weightlifters were equipped with 39 markers and their motion captured with 8 Vicon cameras at 100 Hz. Lifts of 60, 85, and 95% of the one repetition maximum were analyzed. The first PCA analyzed variance among time-normed waveforms compiled from subjects and trials; the second PCA analyzed postural positions compiled over time, subjects and (...) trials. Load effects were identified through repeated measures ANOVAs with Bonferroni-corrected post-hocs and through Cousineau-Morey confidence intervals. PCAtrial scores differed in the first and fifth principal component, suggesting that increased barbell load produced higher initial elevation, lower squat position, wider feet position after squatting, and less inclined arms. PCAposture revealed significant timing differences in all components. We conclude, first, barbell load affects specific aspects of the movement pattern of the clean; second, the PCAtrial approach is better suited for detecting deviations from a mean motion trajectory and its results are easier to interpret; the PCAposture approach reveals coordination patterns and facilitates comparisons of postural speeds and accelerations. (shrink)

The principal goal of the brain-computer interface is to translate brain signals into meaningful commands to control external devices or neuroprostheses to restore lost functions of patients with severe motor disabilities. The invasive recording of brain signals involves numerous health issues. Therefore, BCIs based on non-invasive recording modalities such as electroencephalography are safer and more comfortable for the patients. The BCI requires reconstructing continuous movement parameters such as position or velocity for practical application of neuroprostheses. The BCI studies in (...) continuous decoding have extensively relied on extracting features from the amplitude of brain signals, whereas the brain connectivity features have rarely been explored. This study aims to investigate the feasibility of using phase-based connectivity features in decoding continuous hand movements from EEG signals. To this end, the EEG data were collected from seven healthy subjects performing a 2D center-out hand movement task in four orthogonal directions. The phase-locking value and magnitude-squared coherence are exploited as connectivity features along with multiple linear regression for decoding hand positions. A brute-force search approach is employed to find the best channel pairs for extracting features related to hand movements. The results reveal that the regression models based on PLV and MSC features achieve the average Pearson correlations of 0.43 ± 0.03 and 0.42 ± 0.06, respectively, between predicted and actual trajectories over all subjects. The delta and alpha band features have the most contribution in regression analysis. The results also demonstrate that both PLV and MSC decoding models lead to superior results on our data compared to two recently proposed feature extraction methods solely based on the amplitude or phase of recording signals. This study verifies the ability of PLV and MSC features in the continuous decoding of hand movements with linear regression. Thus, our findings suggest that extracting features based on brain connectivity can improve the accuracy of trajectory decoder BCIs. (shrink)

People are adept at perceiving interactions from movements of simple shapes, but the underlying mechanism remains unknown. Previous studies have often used object movements defined by experimenters. The present study used aerial videos recorded by drones in a real-life environment to generate decontextualized motion stimuli. Motion trajectories of displayed elements were the only visual input. We measured human judgments of interactiveness between two moving elements and the dynamic change in such judgments over time. A hierarchical model was developed to account (...) for human performance in this task. The model represents interactivity using latent variables and learns the distribution of critical movement features that signal potential interactivity. The model provides a good fit to human judgments and can also be generalized to the original Heider–Simmel animations. The model can also synthesize decontextualized animations with a controlled degree of interactiveness, providing a viable tool for studying animacy and social perception. (shrink)

ABSTRACTWe tested the response dynamics of the evaluative priming effect using a mouse tracking procedure that records hand movements during the execution of categorisation tasks. In Experiment 1, when participants performed the evaluative categorisation task but not the non-evaluative semantic categorisation task, their mouse trajectories for evaluatively incongruent trials curved more toward the opposite response than those for evaluatively congruent trials, indicating the emergence of evaluative priming effects based on response competition. In Experiment 2, implementing a task-switching procedure in which (...) evaluative and non-evaluative categorisation tasks were intermixed, we obtained reliable evaluative priming effects in the non-evaluative semantic categorisation task as well as in the evaluative categorisation task when participants assigned attention to the evaluative stimulus dime... (shrink)

‘Police arrested suspected criminals in a satanic place masquerading as a church … There is no church there, but there is Satanism … Those people are not praying for anything, but they have hypnotised abantu [people]’. Informed by a decoloniality lens in relation to motifs such as coloniality of power and knowledge and being, I argue that mafiarised religions in South Africa thrive through psychic capture theology. Some emerging religious movements subject their followers to unthinkable practices, which makes outsiders question (...) the way in which both religious leaders and adherents operate outside the conventionally accepted practice of religion, and, instead, indulge in practices characterised by manipulation, corruption and mental destabilisation. I respond to two questions: What are the trajectories of a religion that zombifies, and how can the social pathologies of psychic capture theology be addressed? I respond to these questions with special reference to the Seven Angels Ministry and Penuel Mnguni. I argue that some emerging ministries strive to destroy the psychic ability of adherents, to achieve strategic distance that dehumanises, removes people from the zone of being, and causes them to question their ontological density. I end the article by arguing that there is a need for religion to be regulated, and reintroduced, to challenge religious mafias that thrive through mental destabilisation. In doing so, religion can be reconfigured and have relevance in a postcolonial state, such as South Africa, especially in contexts where the rationale of religious discourses is questionable.Contribution: The article contributes to knowledge in the sense that it calls for religion to be problematised and reconstructed within education and sociological space when it dehumanise and removes people from the zone of being. Through this approach, the article fits with the scope for the journal that calls for interdisciplinary approach to the study within the international contexts. (shrink)

Establishing the basic knowledge, methodology, and technology for a framework for the continuous decoding of hand/arm movement intention was the aim of the ERC-funded project “Feel Your Reach”. In this work, we review the studies and methods we performed and implemented in the last 6 years, which build the basis for enabling severely paralyzed people to non-invasively control a robotic arm in real-time from electroencephalogram. In detail, we investigated goal-directed movement detection, decoding of executed and attempted movement (...) trajectories, grasping correlates, error processing, and kinesthetic feedback. Although we have tested some of our approaches already with the target populations, we still need to transfer the “Feel Your Reach” framework to people with cervical spinal cord injury and evaluate the decoders’ performance while participants attempt to perform upper-limb movements. While on the one hand, we made major progress towards this ambitious goal, we also critically discuss current limitations. (shrink)

When describing motion along both the horizontal and vertical axes, languages from different families express the elements encoding verticality before those coding for horizontality (e.g., going up right instead of right up). In light of the motor grounding of language, the present study investigated whether the prevalence of verticality in Path expression also governs the trajectory of arm biological movements. Using a 3D virtual-reality setting, we tracked the kinematics of hand pointing movements in five spatial directions, two of which (...) implied the vertical and horizontal vectors equally (i.e., up right +45° and bottom right −45°). Movement onset could be prompted by visual or auditory verbal cues, the latter being canonical in French (“en haut à droite”/up right) or not (“à droite en haut”/right up). In two experiments, analyses of the index finger kinematics revealed a significant effect of gravity, with earlier acceleration, velocity, and deceleration peaks for upward (+45°) than downward (−45°) movements, irrespective of the instructions. Remarkably, confirming the linguistic observations, we found that vertical kinematic parameters occurred earlier than horizontal ones for upward movements, both for visual and congruent verbal cues. Non-canonical verbal instructions significantly affected this temporal dynamic: for upward movements, the horizontal and vertical components temporally aligned, while they reversed for downward movements where the kinematics of the vertical axis was delayed with respect to that of the horizontal one. This temporal dynamic is so deeply anchored that non-canonical verbal instructions allowed for horizontality to precede verticality only for movements that do not fight against gravity. Altogether, our findings provide new insights into the embodiment of language by revealing that linguistic path may reflect the organization of biological movements, giving priority to the vertical axis. (shrink)

The growth of autistic self-advocacy and the neurodiversity movement has brought about new ethical, theoretical and ideological debates within autism theory, research and practice. These debates have had genuine impact within some areas of autism research but their influence is less evident within early intervention research. In this paper, we argue that all autism intervention stakeholders need to understand and actively engage with the views of autistic people and with neurodiversity as a concept and movement. In so doing, (...) intervention researchers and practitioners are required to move away from a normative agenda and pay diligence to environmental goodness-of-fit, autistic developmental trajectories, internal drivers and experiences, and autistic prioritized intervention targets. Autism intervention researchers must respond to these debates by reframing effectiveness, developing tools to measure autistic prioritized outcomes, and forming partnerships with autistic people. There is a pressing need for increased reflection and articulation around how intervention practices align with a neurodiversity framework and greater emphasis within intervention programmes on natural developmental processes, coping strategies, autonomy, and well-being. (shrink)

This article examines Guattari’s broad political investment with regard to a molecular revolution of institutions through his reflection on one complex event, the 22nd of March Movement at Nanterre. I want to consider this example for two reasons. First, it is general enough to provide a non-clinical foundation for specific kinds of innovations that preoccupy many of his readers who comment on these issues and centre their work on historical clinical examples within the trajectory of institutional psychotherapy from (...) Saint-Alban to La Borde. And second, it is not so far divorced from the orbit of cure where institutional analysts cut their teeth, as it were, in the early 1960s left-wing student groups devoted to health issues. The question of cure, here, remains tied to the recognition of the influence of an institution and how it may be changed, but shifts in my example from clinic to campus and factory and, ultimately, to all of French society. (shrink)

Research suggests that the reaching hand automatically deviates toward a target that changes location during the reach. In the current study, we investigated whether movement intention can influence the target jump’s impact on the hand. We compared the degree of trajectory deviation to a jumped target under three instruction conditions: GO, in which participants were told to go to the target if it jumped, STOP, in which participants were told to immediately stop their movement if the target (...) jumped, and IGNORE, in which participants were told to ignore the target if it jumped and to continue to its initial location. We observed a reduced response to the jump in the IGNORE condition relative to the other conditions, suggesting that the response to the jump is contingent on the jump being a task-relevant event. (shrink)

In this paper we document the developmental trajectory of the complementizer system (CP-system) in Italian by looking at the earliest spontaneous production of eleven young children, whose transcriptions are available on CHILDES. We conducted a novel corpus analysis, tracking down a number of constructions in which the clausal left-periphery is activated. First, we considered the appearance of the different complementizer particles in the CP-system, which overtly realize the three distinct functional projections ForceP, IntP, and FinP. The analysis revealed that (...) children acquiring Italian correctly use these complementizer particles already in the third year of life. Second, we looked for the simultaneous activation of different functional projections within the CP-system. We went through our corpus searching for complex sentences in which more than one constituent was moved to the left periphery. This option is allowed by the adult grammar of Italian and, as our search revealed, it is also attested in the grammar of young children. Soon after their second birthday, sequences in which a left-dislocated Topic and a Wh- element co-occur are attested, directly supporting the existence of a (high) Topic position above FocusP. Moreover, movement in general conforms to the constraints of the adult grammar, with no attested violation of obligatory inversion (a consequence of the Q-Criterion). Importantly, “why-questions” did not require inversion, much as in the adult grammar of Italian. Taken together, children's use of complementizer particles and their activation of multiple landing sites for movement show that 2-year-olds already possess a richly articulated functional structure of the CP-system, aligned to the layered adult structure. In concluding the paper, we also discuss some temporal differences between constructions activating high and low portions of the CP-system. In particular, we detect a temporal precedence for wh-questions over why-questions. Since the former activate a lower projection, this is consistent with the recently proposedGrowing Treeshypothesis, according to which the development of the CP-system proceeds stepwise. (shrink)

Anti-caste movements in India have a long history. Cultural heritage became and remains a site of political contestation by excluded communities searching for identity and equality, and gender remains at the core of their engagements. The meanings underlying the more homogenous term of ‘Dalit’ used today are part of a historical process of self-definition. Moreover, diverse Dalit countercultures suggest varied social domains in which Dalit communities are located. South Asian historiographies have been critiqued as denying histories and historical agency to (...) Dalits. Yet Dalit studies have developed epistemologies, bringing articulations and ideas from the margins to the centre of writings on history, leading to debates around caste that have transformed notions of politics. This paper draws from one such trajectory through a nonlinear narrative, juxtaposing the intergenerational contexts of engagements: my mother Dakshayani's political and life experiences, as narrated in her autobiography (1912–1978), and my own experience in the Dalit women's and other movements in the 1980s and 1990s. While my experience saw the onset of liberalisation and the emergence and growth of ‘new social movements’, the context of Dakshayani's narrations is the Pulaya (agrestic slave caste) community in the early 1900s in Cochin, a community in the process of transforming itself. Both narratives highlight how radical traditions within the Dalit women's movement over time have consciously and critically addressed anti-caste movements, social reform, the state, peoples’ movements and the nation within a conceptual framework of equality, liberty and non-discrimination. (shrink)

Adapting gross motor movement to match the tempo of auditory rhythmic stimulation is a complex skill with a long developmental trajectory. Drumming tasks have previously been employed with infants and young children to measure the emergence of rhythmic entrainment, and may provide a tool for identification of those with atypical rhythm perception and production. Here we describe a new protocol for measuring infant rhythmic movement that can be employed at scale. In the current study, 50 two-year-olds drummed (...) along with the audiovisual presentation of four steady rhythms, using videos of isochronous drumming at 400, 500, 600, and 700 ms IOI, and provided their spontaneous motor tempo by drumming in silence. Toddlers’ drumming is observed from video recordings made in participants’ own homes, obtained via the Lookit platform for online infant studies. We use OpenPose deep-learning model to generate wireframe estimates of hand and body location for each video. The vertical displacement of the hand was extracted, and the power and frequency of infants’ rhythmic entrainment quantified using Fast Fourier Transforms. We find evidence for age-appropriate tempo-flexibility in our sample. Our results demonstrate the feasibility of a fully digital approach to measuring rhythmic entrainment from within the participant’s home, from early in development. (shrink)

This article addresses two shortcomings in the literature on nationalism: the need to theorize transformations of nationalism, and the relative absence of comparative works on Latin America. We propose a state-focused theoretical framework, centered on conflicts between states elites and social movements, for explaining transformations of nationalism. Different configurations of four key factors — the mobilization of excluded elites and subordinate actors, state elites’ political control, the ideological capacities of states, and polarization around ethnoracial cleavages — shape how contrasting trajectories (...) of nationalism unfold over time. A comparative analysis of early– and mid–twentieth century Mexico, Argentina, and Peru illustrates the explanatory power of our theoretical framework. (shrink)

This commentary focuses on issues related to Glover's suppositions regarding the information available to the on-line control system and the behavioral consequences of (visual) information disruption. According to the author, a “highly accurate,” yet temporally unstable, visual representation of peripersonal space is available for real-time trajectory corrections. However, no direct evidence is currently available to support the position.

The present investigation directs itself towards the individualization of a possible area of intersection between the Philosophy for Children curriculum and the world of Kinetic Sciences? This trajectory follows two lines of inquiry. The principal arises from an analysis of the person as a live body, as a body that expresses through movements characteristics of rationality and intentionality. A particular focus on how and on what role the body “subject” is engraved in the typical philosophy for children context. Along (...) these lines, to support such an analysis, we compare the philosophy for children curriculum with other educational contexts. The second line of research, which is only sketched here, establishes a relationship with an analysis of the body “object” of discussion in the philosophy for children curriculums. (shrink)