Reaching within video-capture virtual reality: using virtual reality as a motor control paradigm.

We have developed a virtual reality (VR) system that integrates a three-dimensional tracking device with a video-capture VR platform to record upper limb movements. The influence of target velocity on planning and execution of reaching movements was studied in five healthy subjects. Our initial results suggest that a target's velocity is considered when planning an interceptive action and that a hand reaching toward a moving virtual target is controlled in a similar way to how it is in the real visual environment.     

Lay Personality Theories in Interactive Decisions: Strongly Held,Weakly Supported

In interactive decisions, cues to what others will do are important in forming a strategy. Information about others' personalities appears to be potentially valuable for this purpose. We report a series of four studies examining how information about another actor's personality influences people's own choices in interactive decisions. The studies found widespread beliefs that others' personality characteristics are strongly predictive both of broad classes of decision behavior (competition/cooperation, risk‐seeking/risk‐aversion) (Study 1) and of specific choices (Study 2) in single‐agent settings. These beliefs extended to predicting others' choices in interactive decisions (Study 3) and to shaping the predictor's own decisions in interactive play in Chicken and Assurance games (Study 4). Overall, we found extensive evidence that laypeople believe that the personality traits we selected (angry‐hostility, anxiety, assertiveness, excitement‐seeking, and warmth) have substantial effects on behavior in interactive decisions and they act on those beliefs when making their own decisions. The empirical evidence supporting the predictive validity of these traits was, however, quite weak. Copyright © 2014 John Wiley & Sons, Ltd.     

Pedagogical cues encourage toddlers' transmission of recently demonstrated functions to unfamiliar adults

Young children use pedagogical cues as a signal that others' actions are social or cultural conventions. Here we show that children selectively transmit (enact in a new social situation) causal functions demonstrated pedagogically, even when they have learned and can produce alternative functions as well. Two‐year‐olds saw two novel toys, each with two functions. One experimenter demonstrated one function using pedagogical cues (eye contact and child‐directed speech) and a second experimenter demonstrated the alternative function using intentional actions towards the object, but without pedagogical cues. Children imitated both functions at equal rates initially, indicating equal causal learning from both types of demonstration. However, they were significantly more likely to enact the pedagogical function for a new adult not present during the initial demonstrations. These results indicate that pedagogical cues influence children's transmission of information, perhaps playing a role in the dissemination of cultural conventions from a young age.     

Cognates interfere with language selection but enhance monitoring in connected speech

The current study investigated the contribution of phonology to bilingual language control in connected speech. Speech production was elicited by asking Mandarin–English bilinguals to read aloud paragraphs either in Chinese or English, while six words were switched to the other language in each paragraph. The switch words were either cognates or noncognates, and switching difficulty was measured by production of cross-language intrusion errors on the switch words (e.g., mistakenly saying 巧克力 (qiao3-ke4-li4) instead of chocolate). All the bilinguals were Mandarin-dominant, but produced more intrusion errors when target words were written in Chinese than when written in English (i.e., they exhibited robust reversed dominance effects). Most critically, bilinguals produced significantly more intrusions on Chinese cognates, but also detected and self-corrected these same errors more quickly than with noncognates. Phonological overlap boosts dual-language activation thus leading to greater competition between languages, and increased response conflict, thereby increasing production of intrusions but also facilitating error detection during speech monitoring.     

Children's Adjustment in a Climate of Political Violence: Comparing Mother and Child Reports

There is a dearth of research on parent and child reports regarding a parent’s parenting and its contribution to a child’s adjustment. Therefore, the current study examined: (a) the differences between mother and child reports of aspects of maternal parenting (i.e., care and control), among both boys and girls; (b) which parenting report (i.e., mother’s or child’s) makes a stronger contribution to mother and child reports of the child’s adjustment in the context of political violence. One hundred and twenty-one mother-child dyads (children aged seven to 12 years old (M?=?10.02, SD?=?1.03)), who were exposed to prolonged political violence, participated in this study. Maternal care and control were assessed by mother and child reports on the Parental Bonding Instrument. Child’s adjustment was assessed both by mother’s report of child’s total difficulties and child’s self-report of posttraumatic stress symptoms (PTSS). Results revealed that both the mothers of girls and the girls themselves reported higher care, in comparison to mothers of boys and the boys themselves, while mothers of boys and the boys themselves reported higher control. Higher maternal control, as reported by the child, was associated with the child’s self-reported PTSS. Higher maternal control, as reported by the mother, was associated with the child’s total difficulties, as reported by the mother. However, maternal care, whether reported by mother or child, was not found to be associated with the child’s adjustment. School-aged children and their mothers were in agreement regarding maternal dimensions and their contribution to children’s adjustment.