Evidence from language acquisition suggests that words are powerful mechanisms in the acquisition of substance concepts. Infants initially approach language with the general expectation that words refer to real kinds, regardless of grammatical cues to the contrary.

Bloom provides a masterful synthesis of recent advances in word-learning, placing them within the framework of abiding theoretical issues. I will augment and challenge his approach by underscoring the significance of word extension for questions concerning (a) the origin and evolution of infants' expectations, and (b) domain-specificity in word-learning.

Questions about concepts bring into play all the cognitive science disciplines. For many centuries, concepts belonged to philosophy; but more recently, these original caretakers have shared responsibility for this domain with cognitive and developmental psychology, linguistics, artificial intelligence, anthropology, and neuroscience. Each of these fields has offered insights into these building blocks of thought, and each has contributed a unique perspective on fundamental questions about the nature of minds. However, the integrative approach of cognitive science holds the promise of providing (...) new vantage points from a range of disciplines on this core issue. (shrink)

Rhythm is key to language acquisition. Across languages, rhythmic features highlight fundamental linguistic elements of the sound stream and structural relations among them. A sensitivity to rhythmic features, which begins in utero, is evident at birth. What is less clear is whether rhythm supports infants' earliest links between language and cognition. Prior evidence has documented that for infants as young as 3 and 4 months, listening to their native language supports the core cognitive capacity of object categorization. This precocious link (...) is initially part of a broader template: listening to a non-native language from the same rhythmic class as and to vocalizations of non-human primates provide English-acquiring infants the same cognitive advantage as does listening to their native language. Here, we implement a machine-learning approach to ask whether there are acoustic properties, available on the surface of these vocalizations, that permit infants' to identify which vocalizations are candidate links to cognition. We provided the model with a robust sample of vocalizations that, from the vantage point of English-acquiring 4-month-olds, either support object categorization or fail to do so. We assess whether supervised ML classification models can distinguish those vocalizations that support cognition from those that do not, and which class of acoustic features best support that classification. Our analysis reveals that principal components derived from rhythm-relevant acoustic features were among the most robust in supporting the classification. Classifications performed using temporal envelope components were also robust. These new findings provide in principle evidence that infants' earliest links between vocalizations and cognition may be subserved by their perceptual sensitivity to rhythmic and spectral elements available on the surface of these vocalizations, and that these may guide infants' identification of candidate links to cognition. (shrink)

Infants are endowed with a proclivity to acquire language, whether it is presented in the auditory or visual modality. Moreover, in the first months of life, listening to language supports fundamental cognitive capacities, including infants’ facility to form object categories. Recently, we have found that for English-acquiring infants as young as 4 months of age, this precocious interface between language and cognition is sufficiently broad to include not only their native spoken language, but also sign language. In the current study, (...) we take this work one step further, asking how “sign-naïve” infants—hearing infants with no prior exposure to sign language—deploy their attentional and social strategies in the context of episodes involving either spoken or sign language. We adopted a now-standard categorization task, presenting 4- to 6-month-old infants with a series of exemplars from a single category. Each exemplar was introduced by a woman who appeared on the screen together with the object. What varied across conditions was whether this woman introduced the exemplar by speaking or signing. We coded infants’ visual attentional strategies and their spontaneous vocalizations during this task. Infants’ division of attention and visual switches between the woman and exemplar varied as a function of language modality. In contrast, infants’ spontaneous vocalizations revealed similar patterns across languages. These results, which advance our understanding of how infants allocate attentional resources and engage with communicative partners across distinct modalities, have implications for specifying our theories of language acquisition. (shrink)

In the mid-1970s and early 1980s, several feminist theorists began developing alternatives to the traditional methods of scientific research. The result was a new theory, now recognized as Standpoint Theory, which caused heated debate and radically altered the way research is conducted. The Feminist Standpoint Theory Reader is the first anthology to collect the most important essays on the subject as well as more recent works that bring the topic up-to-date. Leading feminist scholar and one of the founders of Standpoint (...) Theory, Sandra Harding brings together the a prestigious list of scholars--Dorothy Smith, Donna Haraway, Patricia Hill Collins, Nancy Hartsock and Hilary Rose--to not only showcase the most influential essays on the topic but to also highlight subsequent developments of these approaches from a wide variety of disciplines and intellectual and political positions. The Reader will be essential reading for feminist scholars. (shrink)

Commentators divide on whether the basic elements of Hume’s philosophy—perceptions, their division into impressions and ideas, and their associative relation—should be construed as objects and relations between objects or as representations of objects and their relations. Although the latter reading is generally favored, in this chapter the author argues that the textual evidence favors the former and that Hume’s philosophy should be interpreted accordingly. The focus is on Part 1 of the first book of the Treatise but subsequent texts are (...) considered as well, particularly passages in Part 4, Sections 2 and 6. (shrink)

When in 2006 the Centers for Disease Control and Prevention issued revised recommendations for HIV testing in health care settings, vocal opponents charged that use of an ?opt-out? approach to presenting HIV testing to patients; the implementation of nontargeted, widespread HIV screening; the elimination of a separate signed consent; and the decoupling of required HIV prevention counseling from HIV testing are unethical. Here we undertake the first systematic ethical examination of the arguments both for and against the recommendations. Our examination (...) reveals that the ethical concerns raised by the critics predominately pertain not to ethically suspect elements of the recommendations themselves, but to suspicions that they will be implemented improperly. It has not been shown that the recommendations cannot be implemented properly. Here we show that in the United States the recommendations are morally justifiable and that safeguards or regulatory oversight may serve to ensure that the recommendations are properly implemented. (shrink)

Spanish translation of Field, S. L. (2014). 'Hobbes and the question of power'. Journal of the History of Philosophy, 52(1), 61-86. Thomas Hobbes has been hailed as the philosopher of power par excellence; however, I demonstrate that Hobbes’s conceptualization of political power is not stable across his texts. Once the distinction is made between the authorized and the effective power of the sovereign, it is no longer sufficient simply to defend a doctrine of the authorized power of the sovereign; such (...) a doctrine must be robustly complemented by an account of how the effective power commensurate to this authority might be achieved. Nor is this straightforward: for effective political power can fluctuate, sometimes severely. In this light, the prevalent juridical reading of Hobbes’s political philosophy is inadequate. (shrink)