The differing roles of comparison and contrast in children’s categorization

Comparison of perceptually similar exemplars from an object category encourages children to overlook compelling perceptual similarities and use relational and functional properties more relevant for taxonomic categorization. This article investigates whether showing children a contrasting object that is perceptually similar but out of kind serves the same function as comparison in heightening children’s attention to taxonomically relevant features. In this study, 4-year-olds completed a forced-choice categorization task in which they viewed exemplars from a target category and then selected among (a) a perceptually similar out-of-kind object, (b) a category member that differed perceptually from the exemplars, and (c) a thematically related object. Children were assigned to one of four conditions: No-Compare/No-Contrast, Compare/No-Contrast, No-Compare/Contrast, or Compare/Contrast. As in previous work, comparison increased the frequency of category responses, but there was no effect of contrast on categorization. However, only those in the Compare/Contrast condition displayed consistently taxonomic patterns of responding. Follow-up studies revealed that the effect of comparison plus contrast was evident only when comparison preceded, rather than followed, contrast information and that the value added by providing contrastive information is not attributable to the perceptual similarity between the category exemplars and the contrast object. Comparison and contrast make differing contributions to children’s categorization.     

Using group consciousness theories to understand political activism: case studies of Barack Obama, Hillary Clinton, and Ingo Hasselbach

I describe and integrate several theories of group consciousness and collective action, along with 3 case studies of political activists. I have 2 goals: (1) to use the theories to help us understand something puzzling about each life and (2) to use the cases to complicate and expand the theories. Barack Obama's case raises the question of how someone with a politicized Black identity evolved into a politician working for all oppressed people and complicates racial identity development theory. Hillary Clinton's case raises the question of how a middle-class White girl raised in a conservative family became a prominent Democratic Party politician and complicates group consciousness theories by demonstrating the importance of generation and personality. Ingo Hasselbach's (a former German neo-Nazi leader) case illustrates relative deprivation theory and raises the question of whether theories developed to explain subordinate group consciousness can be applied to movements of dominant group consciousness.     

Music interferes with learning from television during infancy

Infants are frequently exposed to music during daily activities, including free play, and while viewing infant‐directed videotapes that contain instrumental music soundtracks. In Experiment 1, an instrumental music soundtrack was played during a live or televised demonstration to examine its effects on deferred imitation by 6‐, 12‐, and 18‐month‐old infants. Transfer of information was indexed via deferred imitation of the target actions following a 24‐h delay. For half the infants, the music context was also reinstated at the time of test. Performance by experimental groups was compared to that of a baseline control group that participated in the test session without prior exposure to the demonstration. Imitation performance was above baseline for the live groups but not for the video groups regardless of age or the music context at test. In Experiment 2, we added matched sound effects to the video demonstration and infants performed above baseline. We conclude that the music track creates additional cognitive load, disrupts selective attention to the target actions and inhibits transfer of learning from television of the imitation task. Music may impair an infant's ability to translate information from a two‐dimensional to three‐dimensional world even if the auditory context remains the same. Copyright © 2010 John Wiley & Sons, Ltd.     

Couples' Perceptions of Each Other's Daily Affect: Empathic Accuracy,Assumed Similarity,and Indirect Accuracy

This study examined couples' perceptions of each other's daily affect, using a daily diary methodology. Specifically, we tested the extent to which couples accurately inferred how their partner was feeling (empathic accuracy) and the extent to which spouses used their own feelings as a gauge for how their partner was feeling (assumed similarity). We also tested for indirect accuracy in couples' perceptions; that is, that assumed similarity in the context of actual similarity leads to empathic accuracy. Participants were 51 couples who completed daily diaries for seven consecutive nights. Results based on the Actor‐Partner Interdependence Model indicated that couples showed both empathic accuracy and assumed similarity in their perception of their partner's positive affect; however, they used assumed similarity in rating their partner's hard negative (anger, hostility) and soft negative (sadness, fear) affect. Furthermore, tests of indirect accuracy found that wives were indirectly accurate in perceiving their husbands' positive affect and both husbands and wives were indirectly accurate in perceiving each other's hard negative affect because they were biased. Complementing laboratory studies, the present study highlights that examining couples' perceptions of each other's feelings in contexts of daily life, and differentiating positive and negative emotions, can further our understanding of the role of emotions for healthy relationship functioning.     

Effects of stimulus presentation order during auditory–visual conditional discrimination training for children with autism spectrum disorder

Children with autism spectrum disorder are typically taught conditional discriminations using a match‐to‐sample arrangement. Consideration should be given to the temporal order in which antecedent stimuli (the sample and comparison stimuli) are presented during match‐to‐sample trials, as various arrangements have been used in the extant literature. The purpose of the current study was to compare the effects of four stimulus presentation orders on the acquisition of auditory–visual conditional discriminations. The study included participants from a clinically relevant population (three children with autism spectrum disorder), employed clinically relevant teaching procedures, and included two presentation formats not included in previous comparison evaluations (simultaneous and sample‐first with re‐presentation conditions). Results were found to be learner‐specific; that is, a different stimulus presentation format was most efficient for each participant. We provide suggestions to evaluate stimulus control topographies and enhance experimental control in match‐to‐sample arrangements.     

Built to last: Interactive effects of perceived overqualification and proactive personality on new employee adjustment

We integrate relative deprivation and broaden and build theories to develop a process-based model of perceived overqualification and its relationship with new employee adjustment via “broaden and build” mechanisms (i.e., reciprocal relationships between initial status and change trajectories in work-related positive affect and perceived job autonomy). Additionally, we examine how new employee proactive personality may influence this process. Analyses of weekly survey responses from 331 new employees of a large financial institution throughout their first 90 days of employment revealed that those who felt overqualified generally experienced less work-related positive affect and perceived less job autonomy when beginning their jobs (assessed the first week of employment) than their more qualified counterparts. Moreover, initial levels of perceived job autonomy were positively associated with adjustment outcomes (assessed at 90 days of employment) via linear change in positive affect over time (assessed weekly, up to 8 weeks of employment). These findings suggest that perceived overqualification may negatively influence newcomer adjustment by stunting broaden and build processes. However, proactive personality attenuated this effect. Theoretical and practical implications are discussed.     

Pilot Effectiveness of a Stress Management Program for Sheltered Homeless Adults With Mental Illness: A Two-Group Controlled Study

This study examined the effectiveness of a stress management intervention for sheltered homeless adults with mental illness. Twelve intervention participants received a 6-week, 1-hour psychoeducation group combined with a 20-minute meditation. Eleven matched pairs did not receive intervention and served as controls. At 1 week post study, intervention participants reported a statistically significant reduction in perceived stress (Z=??2.285, p < .02, d=??1.176) compared to controls. No differences were found at 1 week post study between intervention and control participants on reported quality of life. This study provides pilot data on the effectiveness of an occupation-based stress management program for sheltered homeless adults and warrants further study.     

Coordinating between Graphs and Science Concepts: Density and Buoyancy

Graphs illustrating complex scientific relationships require students to integrate multiple concepts and visual features into a coherent understanding. We investigate ways to support students in integrating their understanding of density concepts through a graph that is linked to a simulation depicting the relationship between mass, volume, and density. We randomly assigned 325 8^th-grade students to 1 of 2 graphing activities. In the analyze condition, students plotted a set of data points selected to help clarify the relationship between mass, volume, and buoyancy, and then interacted with a guided simulation to improve their plotting accuracy. In the generate condition, students chose their own data points, and then interacted with a guided simulation to test and revise their choices. We found that, although analyze participants were more likely to construct accurate graphs, generate participants were more likely to develop a coherent understanding of density and buoyancy. Analyses of process data and interviews suggest that generate participants grappled with the mass-volume ratio by deliberately testing points and identifying patterns as they updated their understanding of science concepts. In contrast, analyze participants displayed less deliberate exploration of the graph space. We discuss how activities that integrate graph interpretation and concept refinement can deepen science learning.     

Initiation of evidence-based psychotherapies in Veterans with posttraumatic stress disorder

The Department of Veterans Affairs (VA) requires that all VA hospitals and clinics provide access to evidence-based psychotherapies (EBPs). Despite these widespread dissemination efforts, only a minority of Veterans receive EBP services. Reasons for these low rates of EBP utilization are largely unknown. This study examined the characteristics of Veterans with posttraumatic stress disorder (PTSD) who did (Initiation group) and did not (No-Initiation group) initiate a VA-approved EBP after participating in an information session. Veterans chose their preferred treatment from a menu of EBPs. Results demonstrated that Veterans in the No-Initiation group had longer periods of time between their referral and first EBP visit. Among Veterans in the Initiation group, the majority (68%) initiated a trauma-focused EBP as their first or second treatment, suggesting that providing a range of treatment options did not negatively impact their willingness to engage in PTSD treatment. Results are discussed in terms of VA initiatives to improve access to and initiation of mental health care for Veterans.     

Deployment trauma and seeking treatment for PTSD in US soldiers

Many service members in need of mental health treatment do not seek such treatment. This study investigated the frequency of Army soldiers’ exposure to specific types of deployment stressors and whether different event-types were associated with willingness to seek and actual receipt of treatment. Male soldiers who were married (n = 600) completed online surveys that assessed posttraumatic stress disorder (PTSD), willingness to seek treatment for PTSD, actual receipt of PTSD treatment, and the frequency of exposure to 4 types of potentially traumatizing warzone experiences: committing a moral injury, observing a moral injury, threats to life, and traumatic loss. Soldiers who reported greater exposure to moral injury experiences (committed or observed) were less likely to be willing to seek treatment, regardless of PTSD symptom severity. Although exposure to moral injury did not differentiate actual treatment receipt, soldiers who endorsed loss were more likely to have received treatment, regardless of PTSD symptom severity. These results suggest that the types of trauma experienced during deployment may be a factor in postdeployment treatment-seeking attitudes and behaviors.