Flexibility in Visual Working Memory: Accurate Change Detection in the Face of Irrelevant Variations in Position

Many recent studies of visual working memory have used change-detection tasks in which subjects view sequential displays and are asked to report whether they are identical or if one object has changed. A key question is whether the memory system used to perform this task is sufficiently flexible to detect changes in object identity independent of spatial transformations, but previous research has yielded contradictory results. To address this issue, the present study compared standard change-detection tasks with tasks in which the objects varied in size or position between successive arrays. Performance was nearly identical across the standard and transformed tasks unless the task implicitly encouraged spatial encoding. These results resolve the discrepancies in prior studies and demonstrate that the visual working memory system can detect changes in object identity across spatial transformations.     

Building biases in infancy: the influence of race on face and voice emotion matching

Early in the first year of life infants exhibit equivalent performance distinguishing among people within their own race and within other races. However, with development and experience, their face recognition skills become tuned to groups of people they interact with the most. This developmental tuning is hypothesized to be the origin of adult face processing biases including the other-race bias. In adults the other-race bias has also been associated with impairments in facial emotion processing for other-race faces. The present investigation aimed to show perceptual narrowing for other-race faces during infancy and to determine whether the race of a face influences infants' ability to match emotional sounds with emotional facial expressions. Behavioral (visual-paired comparison; VPC) and electrophysiological (event-related potentials; ERPs) measures were recorded in 5-month-old and 9-month-old infants. Behaviorally, 5-month-olds distinguished faces within their own race and within another race, whereas 9-month-olds only distinguish faces within their own race. ERPs were recorded while an emotion sound (laughing or crying) was presented prior to viewing an image of a static African American or Caucasian face expressing either a happy or a sad emotion. Consistent with behavioral findings, ERPs revealed race-specific perceptual processing of faces and emotion/sound face congruency at 9 months but not 5 months of age. In addition, from 5 to 9 months, the neural networks activated for sound/face congruency were found to shift from an anterior ERP component (Nc) related to attention to posterior ERP components (N290, P400) related to perception.     

Fisher transformation based confidence intervals of correlations in fixed- and random-effects meta-analysis

Meta-analyses of correlation coefficients are an important technique to integrate results from many cross-sectional and longitudinal research designs. Uncertainty in pooled estimates is typically assessed with the help of confidence intervals, which can double as hypothesis tests for two-sided hypotheses about the underlying correlation. A standard approach to construct confidence intervals for the main effect is the Hedges-Olkin-Vevea Fisher-z (HOVz) approach, which is based on the Fisher-z transformation. Results from previous studies (Field, 2005, Psychol. Meth., 10, 444; Hafdahl and Williams, 2009, Psychol. Meth., 14, 24), however, indicate that in random-effects models the performance of the HOVz confidence interval can be unsatisfactory. To this end, we propose improvements of the HOVz approach, which are based on enhanced variance estimators for the main effect estimate. In order to study the coverage of the new confidence intervals in both fixed- and random-effects meta-analysis models, we perform an extensive simulation study, comparing them to established approaches. Data were generated via a truncated normal and beta distribution model. The results show that our newly proposed confidence intervals based on a Knapp-Hartung-type variance estimator or robust heteroscedasticity consistent sandwich estimators in combination with the integral z-to-r transformation (Hafdahl, 2009, Br. J. Math. Stat. Psychol., 62, 233) provide more accurate coverage than existing approaches in most scenarios, especially in the more appropriate beta distribution simulation model.     

Effects of Media Images on Attitudes Toward Tanning

Two experiments evaluated the effects of exposure to pictures of suntanned and untanned fashion models on attitudes regarding the importance of having a tan. In Experiment 1, 128 women were randomly assigned to view images of photographer's models that had been digitally altered to make it appear that the model either did or did not have a tan. Participants who viewed images of the models without a tan expressed significantly less positive attitudes toward tanning than did those who viewed the same models with a tan. In Experiment 2, 169 women were randomly assigned to view advertisements taken from fashion and beauty magazines that contained models who appeared to have suntanned skin, models who appeared not to have a tan, or no models at all. The results demonstrated that participants who viewed ads depicting models with untanned skin expressed less favorable attitudes toward tanning than did those who viewed control ads or those who viewed tan models. Given escalating skincancer rates, it is important to examine the role that media exposure may play in promoting risky behaviors.     

The differential contribution of facial expressions,prosody, and speech content to empathy

Background: Facial expressions, prosody, and speech content constitute channels by which information is exchanged. Little is known about the simultaneous and differential contribution of these channels to empathy when they provide emotionality or neutrality. Especially neutralised speech content has gained little attention with regards to influencing the perception of other emotional cues. Methods: Participants were presented with video clips of actors telling short-stories. One condition conveyed emotionality in all channels while the other conditions either provided neutral speech content, facial expression, or prosody, respectively. Participants judged the emotion and intensity presented, as well as their own emotional state and intensity. Skin conductance served as a physiological measure of emotional reactivity. Results: Neutralising channels significantly reduced empathic responses. Electrodermal recordings confirmed these findings. The differential effect of the communication channels on empathy prerequisites was that target emotion recognition of the other decreased mostly when the face was neutral, whereas decreased emotional responses attributed to the target emotion were especially present in neutral speech. Conclusion: Multichannel integration supports conscious and autonomous measures of empathy and emotional reactivity. Emotional facial expressions influence emotion recognition, whereas speech content is important for responding with an adequate own emotional state, possibly reflecting contextual emotion-appraisal.     

Mobbing

Bullying at the workplace and its negative effects on mental and physical health are a subject of avid public discussion with the mass media being part of this process. Often bullying at the workplace is assumed to result in somewhat specific consequences due to causal relationships. Contrarily, research suggests relatively complex interactions between bullying and negative health outcomes. Furthermore, the use of the term bullying is inflated, lowering the threshold for a conflict to be categorized in this way. This article reviews the bullying concept: what is the definition of bullying and how common is it in the work environment? What consequences of bullying are discussed in the literature and to what extent are they empirically confirmed? Which causes for bullying are accepted? Having answered these questions it will be discussed why the bullying concept is so popular and why this popularity might counteract more appropriate conceptualizations of the problem.     

Post-irradiation annealing behaviour of oxide dispersion strengthened Fe-Cr alloys studied by nanoindentation

ABSTRACT

To study the nature of irradiation-induced nanofeatures in oxide dispersion strengthened (ODS) Fe-Cr alloys, post-irradiation isochronal thermal annealing up to 600°C was performed for ODS Fe-9%Cr and Fe-14%Cr alloys ion-irradiated at 300°C and 500°C. Nanoindentation indicated hardening for all as-irradiated alloys and complete hardness recovery upon post-irradiation annealing. Cross-sectional TEM indicated an irradiation-induced defect band near peak damage mainly consisting of dislocation loops. Candidate mechanisms of recovery were critically evaluated. Shrinkage of loops via capture of thermal vacancies was found to correctly reflect the annealing behaviour of ODS Fe-9Cr irradiated at 300°C.     

The role of the self‐fulfilling prophecy in young adolescents' responsiveness to a substance use prevention program

This research examined whether naturally occurring self‐fulfilling prophecies influenced adolescents' responsiveness to a substance use prevention program. The authors addressed this issue with a unique methodological approach that was designed to enhance the internal validity of research on naturally occurring self‐fulfilling prophecies by experimentally controlling for prediction without influence. Participants were 321 families who were assigned to an adolescent substance use prevention program that either did or did not systematically involve parents. Results showed that parents' perceptions about the value of involving parents in adolescent substance use prevention predicted adolescents' alcohol use more strongly among families assigned to the prevention program that systematically involved parents than to the one that did not. The theoretical and practical implications of these findings are discussed.