Is a Pink Cow Still a Cow? Individual Differences in Toddlers' Vocabulary Knowledge and Lexical Representations

When a toddler knows a word, what does she actually know? Many categories have multiple relevant properties; for example, shape and color are relevant to membership in the category banana . How do toddlers prioritize these properties when recognizing familiar words, and are there systematic differences among children? In this study, toddlers viewed pairs of objects associated with prototypical colors. On some trials, objects were typically colored (e.g., Holstein cow and pink pig); on other trials, colors were switched (e.g., pink cow and Holstein‐patterned pig). On each trial, toddlers were directed to find a target object. Overall, recognition was disrupted when colors were switched, as measured by eye movements. Moreover, individual differences in vocabularies predicted recognition differences: Toddlers who say fewer shape‐based words were more disrupted by color switches. “Knowing” a word may not mean the same thing for all toddlers; different toddlers prioritize different facets of familiar objects in their lexical representations.     

Exploring Initiative as a Signal of Knowledge Co‐Construction During Collaborative Problem Solving

Peer interaction has been found to be conducive to learning in many settings. Knowledge co‐construction (KCC) has been proposed as one explanatory mechanism. However, KCC is a theoretical construct that is too abstract to guide the development of instructional software that can support peer interaction. In this study, we present an extensive analysis of a corpus of peer dialogs that we collected in the domain of introductory Computer Science. We show that the notion of task initiative shifts correlates with both KCC and learning. Speakers take task initiative when they contribute new content that advances problem solving and that is not invited by their partner; if initiative shifts between the partners, it indicates they both contribute to problem solving. We found that task initiative shifts occur more frequently within KCC episodes than outside. In addition, task initiative shifts within KCC episodes correlate with learning for low pre‐testers, and total task initiative shifts correlate with learning for high pre‐testers. As recognizing task initiative shifts does not require as much deep knowledge as recognizing KCC, task initiative shifts as an indicator of productive collaboration are potentially easier to model in instructional software that simulates a peer.     

The role of social support on the disclosure of everyday unpleasant emotional events

Talking about unpleasant events has important implications for coping with distress, but the literature has not thoroughly addressed the role of social support on the decision to disclose these events. The authors hypothesized that perceptions of the availability of social support and satisfaction with support received regarding an event would be positively related to the disclosure of the event, and participants’ sex, emotional disclosure tendencies, depression symptoms, and global perceptions of support would moderate these relations. College students (N = 365) reported on 2,001 unpleasant emotional events that they personally experienced in the past week. Multilevel modeling analyses revealed that the perceived availability of support for an event predicted the degree of disclosure of that event, even while controlling for its intensity. Event disclosure predicted satisfaction with the support received for the event, controlling for event intensity and available support. This latter relation was moderated by the participants’ global perceptions of social support, such that the disclosure–satisfaction relation was stronger for individuals who perceived relatively less global social support. These findings suggest that characteristics of the social-support network ought to be considered as an important factor relevant to the decision to disclose everyday unpleasant events.     

Factors That Explain Academic Dishonesty Among University Students in Thailand

Academic dishonesty is a problem that continues to plague universities. Few studies have examined how mind-set and individualism contribute to academic dishonesty. Using structural equation modeling, a model was developed to explain academic dishonesty, which included mind-set, individualistic learning environment, individualism, and motivation to study. A total of 207 university students in Thailand participated. The final model explained 30% of the variance in academic dishonesty. All variables in this study had a negative relationship with academic dishonesty, indicating that improvements in mind-set, learning environment, and motivation could change perceptions of academic dishonesty.     

A deafening flash! Visual interference of auditory signal detection

In some people, visual stimulation evokes auditory sensations. How prevalent and how perceptually real is this? 22% of our neurotypical adult participants responded ‘Yes' when asked whether they heard faint sounds accompanying flash stimuli, and showed significantly better ability to discriminate visual ‘Morse-code’ sequences. This benefit might arise from an ability to recode visual signals as sounds, thus taking advantage of superior temporal acuity of audition. In support of this, those who showed better visual relative to auditory sequence discrimination also had poorer auditory detection in the presence of uninformative visual flashes, though this was independent of awareness of visually-evoked sounds. Thus a visually-evoked auditory representation may occur subliminally and disrupt detection of real auditory signals. The frequent natural correlation between visual and auditory stimuli might explain the surprising prevalence of this phenomenon. Overall, our results suggest that learned correspondences between strongly correlated modalities may provide a precursor for some synaesthetic abilities.     

Expectation creates something out of nothing: The role of attention in iconic memory reconsidered

Conscious experience is modulated by attention and expectation, yet is believed to be independent of attention. The experiments on iconic memory (IM) are usually taken as support for this claim. However, a recent experiment demonstrated that when attention is diverted away from the IM letter display subjects fail to see the absence of IM letters. Here we contribute to the ongoing debate by overcoming experimental shortcomings of this previous experiment, by measuring subjective visibility and by testing the effect of the post-cue. We were able to replicate these earlier findings and extend them by demonstrating that subjects who do not realize the absence of letters perceive illusory letters. This result means that there is still phenomenal consciousness, even when attention is diverted. Expectation creates illusory content that overwrites valid IM content. Taken together these findings suggest that the present experimental paradigm is not appropriate to make claims about IM content.     

Personalising game difficulty to keep children motivated to play with a social robot: A Bayesian approach

For effective child education, playing games with a social robot should be motivating for a longer period of time. One aspect that can affect the motivation of a child is the difficulty of a game. The game should be perceived as challenging, while at the same time, the child should be confident to meet the challenge. We designed a user modelling module that adapts the difficulty of a game to the child’s skill level, in order to provide children with the optimal challenge. This module applies a Bayesian rating method that estimates the child’s skill and game item’s difficulty levels to personalise the game progress. In an experiment with 22 children (aged between 10 and 12 years old), we tested whether the personalisation leads to a higher motivation to play with the robot. Although the personalised system did not challenge the participants optimally, this study shows that the Bayesian rating system is in principle able to measure the skill and performance of children in playing a game with a robot (even without accurate estimates of the difficulty of items). We outline multiple ways in which the rating method and module can be used to further personalise and enhance the child-robot interaction, other than adapting the difficulty of games (e.g. by adapting the dialogue and feedback).     

The Mediating Role of Resiliency in the Relationship Between Temperament and Posttraumatic Growth

The purpose of the research is to investigate the mediating role of resiliency in the relation between temperamental traits and posttraumatic growth. Data of 74 persons who have experienced the death of someone close were analyzed. The range of age of the participants was 21–74 years (M = 38.4; SD = 15.5). The Posttraumatic Growth Inventory (PTGI), the Formal Characteristics of Behavior–Temperament Inventory (FCB-TI), and the Resiliency Assessment Scale were used in the study. Resiliency plays a mediating role among four traits of temperament (Briskness, Emotional Reactivity, Endurance, and Activity) and posttraumatic growth. Resiliency seems to modify the direct impact of temperamental traits on positive posttraumatic changes.     

Psychoeducational Intervention Program about Posttraumatic Growth for Japanese High School Students

This study evaluates the effect of a psychoeducational intervention about posttraumatic growth (PTG) among Japanese adolescents. Study 1 examined whether those who learned about changes related to stress would report higher growth than those who did not. Study 2 examined whether those who learned about PTG perceived more growth than those who learned about negative changes or those who did not learn about potential changes. Findings from both studies indicated that PTG was higher in those who received the intervention program than those who did not. These studies demonstrate the potential effectiveness of a psychoeducational intervention program in fostering adolescents’ perceptions and understanding of their personal growth following stressful experiences. Implications are that the knowledge about not only stress reactions or coping but the possibility of PTG can be integrated into the health education.