Infant-directed speech supports phonetic category learning in English and Japanese

Across the first year of life, infants show decreased sensitivity to phonetic differences not used in the native language [Werker, J. F., & Tees, R. C. (1984). Cross-language speech perception: evidence for perceptual reorganization during the first year of life. Infant Behaviour and Development, 7, 49-63]. In an artificial language learning manipulation, Maye, Werker, and Gerken [Maye, J., Werker, J. F., & Gerken, L. (2002). Infant sensitivity to distributional information can affect phonetic discrimination. Cognition, 82(3), B101-B111] found that infants change their speech sound categories as a function of the distributional properties of the input. For such a distributional learning mechanism to be functional, however, it is essential that the input speech contain distributional cues to support such perceptual learning. To test this, we recorded Japanese and English mothers teaching words to their infants. Acoustic analyses revealed language-specific differences in the distributions of the cues used by mothers (or cues present in the input) to distinguish the vowels. The robust availability of these cues in maternal speech adds support to the hypothesis that distributional learning is an important mechanism whereby infants establish native language phonetic categories.     

Suicidal or self-harming ideation in military personnel transitioning to civilian life

Suicides have markedly increased among military personnel in recent years. We used path analysis to examine factors associated with suicidal/self-harming ideation among male Navy and Marine Corps personnel transitioning to civilian life. Roughly 7% of men (Sailors = 5.3%, Marines = 9.0%) reported ideation during the previous 30 days. Results suggest that combat exposure, substance abuse, and resilience are associated with suicidal ideation/self-harming thoughts through the mediation of posttraumatic stress disorder symptoms and/or depression symptoms. Substance abuse plays a moderating role. Resilience had a direct effect only among the Marines. Implications for improving the transition to civilian life are discussed.     

Visual context modulates potentiation of grasp types during semantic object categorization

Substantial evidence suggests that conceptual processing of manipulable objects is associated with potentiation of action. Such data have been viewed as evidence that objects are recognized via access to action features. Many objects, however, are associated with multiple actions. For example, a kitchen timer may be clenched with a power grip to move it but pinched with a precision grip to use it. The present study tested the hypothesis that action evocation during conceptual object processing is responsive to the visual scene in which objects are presented. Twenty-five healthy adults were asked to categorize object pictures presented in different naturalistic visual contexts that evoke either move- or use-related actions. Categorization judgments (natural vs. artifact) were performed by executing a move- or use-related action (clench vs. pinch) on a response device, and response times were assessed as a function of contextual congruence. Although the actions performed were irrelevant to the categorization judgment, responses were significantly faster when actions were compatible with the visual context. This compatibility effect was largely driven by faster pinch responses when objects were presented in use-compatible, as compared with move-compatible, contexts. The present study is the first to highlight the influence of visual scene on stimulus–response compatibility effects during semantic object processing. These data support the hypothesis that action evocation during conceptual object processing is biased toward context-relevant actions.     

Edna Heidbreder: Systematic and Cognitive Psychologist

After completing her undergraduate degree at Knox College in 1911, Edna Heidbreder was a high school teacher of history for several years. She began her graduate work at the University of Wisconsin where she received a master's degree in philosophy in 1918. Undertaking doctoral work in psychology at Columbia she completed her Ph.D. in 1924 and was offered a position in the Psychology Department at the University of Minnesota. There she remained until 1934 when she accepted a position in the Department of Psychology at Wellesley College which she held until her retirement in 1955. Two lines of interest persisted throughout her career: her work in cognition and systematic psychology. Her book Seven Psychologies published in 1933 has received praise in reviews spanning four decades. Heidbreder views the women of her generation as working during a period when there was a lull in women's rights activism. She believes that most women during that period felt that the best way to improve their situation was to prove that they could be competent professionals as the women pioneers had claimed women could. She believes that today women remain at a disadvantage compared to men in psychology primarily because of the pervasive stereotypes in our society which make it difficult for men to take the intellectual interests and abilities of women seriously.     

Rubber hands feel the touch of light

Two experiments involving a total of 220 subjects are reported. The experiments document that "stroking" a false hand with the bright beam of light from a laser pointer can produce tactile and thermal sensations when the hand can be seen as one's own. Overall, 66% of subjects reported somatic sensations from the light. Felt hand location was recalibrated toward the location of the false hand for those subjects who felt the light. Moreover, the proprioceptive recalibration from the laser experience was comparable to that produced by actual coordinated brushing of the false hand and of the unseen real hand after 2 min of stimulation. The illusion may be experienced on one's real hand as well. The results are discussed in terms of multisensory integration.     

‘I am–we are’: personal and social pathways to further study, work and family life

This project explores the apparent layers in motivation for young people’s plans in order to extend Pathways Theory. We bring together personal, relational and group motivation to explain the planned pathways to study, work and family life. Location was an Australian town, close to the national socio-economic average, to control broad social factors. Participants (N = 78) were 12 to 18 year-old girls and boys (mean age 14.5 years). Results provide little support for popular explanations based on demographic factors (age, gender, family background) and broad personal indicators of self esteem and mood. Instead, the results support proposed differential explanations for pathways to study, work and family life. In particular, personal aspects of identity and self concepts, social expectations and group identity influence young people’s pathways to further study. Group uniqueness explains pathways to paid work, yet experience of higher education tends to limit plans for family life. Findings support inclusion of personal, relational and group motivations in developing innovative theories of pathways motivation. Ongoing work considers common and distinct explanations across socio-economic contexts.