Face perception is a highly conserved process that directs our attention from infancy and is supported by specialized neural circuitry. Oxytocin can increase accuracy and detection of emotional faces, but these effects are mediated by valence, individual differences, and context. We investigated the temporal dynamics of oxytocin’s influence on the neural substrates of face perception using event related potentials (ERP). In a double blind, placebo controlled within-subject design, 21 healthy male adults inhaled oxytocin or placebo and underwent ERP imaging during (...) two face processing tasks. Experiment 1 investigated effects of oxytocin on neural correlates of fearful versus neutral facial expressions, and Experiment 2 manipulated point-of-gaze to neutral faces. In Experiment 1, we found that oxytocin reduced N170 latency to fearful faces. In Experiment 2, N170 latency was decreased when participant gaze was directed to the eyes of neutral faces; however, there were no oxytocin-associated effects in response to different facial features. Findings suggest oxytocin modulates early stages of social perception for socially complex information such as emotional faces relative to neutral. These results are consistent with models suggesting oxytocin impacts the salience of socially informative cues during processing, which leads to downstream effects in behavior. Future work should examine how oxytocin affects neural processes underlying basic components of social behavior (such as, face perception) while varying emotional expression of stimuli or comparing different characteristics of participants (e.g., gender, personality traits). (shrink)

By delineating the parametric variations that affect infant performance in the standard A-not-B search task, the Thelen et al. model provides an important contribution to the field of infant development. We discuss several broad issues pertinent to interpreting the model. We note that the phenomenon modeled by Thelen et al. is not necessarily the one originally described by Piaget. We describe data on infant self-correction that are not addressed by the Thelen et al. model. Finally, we suggest that psychological constructs (...) such as representation and knowledge structures are valuable to our understanding of the A-not-B phenomenon in particular and psychological development in general. (shrink)

The capacity to extract socially relevant information from faces is fundamental to normal reciprocal social interactions and communication. The psychophysical evidence reviewed here demonstrates that humans possess a perceptual apparatus sensitive enough to detect the visual features which are informative of gaze in many face-to-face situations. This article provides evidence for the existence of three functionally and neuroanatomically dissociable eye gaze processing systems. Eye gaze also represents a class of biological motion cues, which engage the posterior superior temporal sulcus for (...) the analysis of intentions and psychological dispositions. Outputs from the anterior superior temporal sulcus constrain processing in the pSTS, linking the observed direction of gaze towards an object or person in the environment with the mentalistic information provided by the gaze shift. A few promising research directions for the field are highlighted. (shrink)