The building blocks of shared leadership: The interactive effects of diversity types,team climate,and time

Despite the wealth of empirical studies and recent meta-analyses demonstrating the positive performance effects of shared leadership, knowledge regarding antecedents is limited. We draw upon a collective approach to leadership identity construction theory and team diversity in order to understand the member attributes that impact leadership sharing. We suggest that both informational/functional and social categorization diversity types are important dimensions when considering shared leadership antecedents. First, we suggest functional diversity will result in higher levels of shared leadership but will only be realized when teams elicit a cooperative climate. Second, we suggest that gender diversity, a salient social category, will have a negative impact on shared leadership, particularly in a low cooperative climate. We further hypothesize these effects will change over time as the positive effects of functional diversity strengthen and the negative effects of gender differences weaken. We test our hypotheses, including the impact on team performance, in a time-lagged sample of 267 undergraduate students in 73 teams competing in a complex business simulation and a constructive replication with 142 MBA students in 41 teams. Theoretical and practical implications are discussed.     

Variation in reversal learning by three generalist mesocarnivores

Animal Cognition - Urbanization imposes novel challenges for wildlife, but also provides new opportunities for exploitation. Generalist species are commonly found in urban habitats, but the...     

Are you feeling successful?: Examining postsecondary student perceptions of success with an expectancy value theory lens

Expectancy Value Theory (EVT) is a prominent theory on student motivation. To add to the growing research in this area, we investigated students within a large, mandatory course outside of the STEM areas, to examine perceptions of success utilizing an EVT lens. The aim of our study was twofold. First, to examine students' open-ended responses about what makes them feel successful. Second, to determine if students’ indorsement of expectancy, value, and control could predict their feelings of success. The study consisted of 210 students who completed an online questionnaire with items related to demographics, EVT components, and questions about their success in the course. Deductive coding was utilized to examine their feelings of success based on the EVT components. Regression analysis was utilized to predict perceptions of success. Students identified several components of their course that were associated with expectancy, value, and cost. Students' perceptions of success were positively predicted by expectancy and negatively predicted by cost while value was not a significant predictor. Our results speak to the importance of expectancy, value, and cost when designing large, mandatory courses. We provided several recommendations for instructors when designing courses, and also highlight limitations and future research directions.

     

Involuntary and voluntary recall of musical memories: A comparison of temporal accuracy and emotional responses

Comparisons between involuntarily and voluntarily retrieved autobiographical memories have revealed similarities in encoding and maintenance, with differences in terms of specificity and emotional responses. Our study extended this research area into the domain of musical memory, which afforded a unique opportunity to compare the same memory as accessed both involuntarily and voluntarily. Specifically, we compared instances of involuntary musical imagery (INMI, or “earworms”)—the spontaneous mental recall and repetition of a tune—to deliberate recall of the same tune as voluntary musical imagery (VMI) in terms of recall accuracy and emotional responses. Twenty participants completed two 3-day tasks. In an INMI task, participants recorded information about INMI episodes as they occurred; in a VMI task, participants were prompted via text message to deliberately imagine each tune they had previously experienced as INMI. In both tasks, tempi of the imagined tunes were recorded by tapping to the musical beat while wearing an accelerometer and additional information (e.g., tune name, emotion ratings) was logged in a diary. Overall, INMI and VMI tempo measurements for the same tune were strongly correlated. Tempo recall for tunes that have definitive, recorded versions was relatively accurate, and tunes that were retrieved deliberately (VMI) were not recalled more accurately in terms of tempo than spontaneous and involuntary instances of imagined music (INMI). Some evidence that INMI elicited stronger emotional responses than VMI was also revealed. These results demonstrate several parallels to previous literature on involuntary memories and add new insights on the phenomenology of INMI.     

Maternal Prenatal Stress and Other Developmental Risk Factors for Adolescent Depression: Spotlight on Sex Differences

Maternal stress during pregnancy has been linked to premorbid abnormalities associated with depression (e.g., difficult temperament, cognitive deficits) in offspring. However, few studies have looked across developmental periods to examine maternal stress during pregnancy and offspring depression during adolescence and whether these associations differ by sex. The current study used data from 1711 mother-offspring dyads (offspring sex: 49.8% male) in a longitudinal birth cohort study. Maternal narratives collected during pregnancy were qualitatively coded for stress-related themes by independent raters. Latent class analysis (LCA) identified distinct subgroups of offspring based on exposure to maternal prenatal stress and other developmental factors from the prenatal, childhood, and adolescent periods that have been associated with depression and/or maternal prenatal stress. LCA identified subgroups that were compared to determine whether and to what extent they differed on adolescent depressive symptoms. LCA revealed a subgroup of “high-risk” individuals, characterized by maternal factors during pregnancy (higher ambivalence/negativity and lower positivity towards the pregnancy, higher levels of hassles, lower maternal education and higher maternal age at birth, higher pre-pregnancy BMI) and offspring developmental factors (decreased cognitive functioning during childhood and adolescence, lower perceived parental support during adolescence, and higher levels of maternal depression during adolescence). High-risk females exhibited elevated conduct symptoms and higher birth order, while high-risk males exhibited decreased internalizing symptoms and lower birth order. Both high-risk males and females reported elevated depressive symptoms during adolescence relative to their “low-risk” counterparts.     

Are Episodic Buffer Processes Intact in ADHD? Experimental Evidence and Linkage with Hyperactive Behavior

Working memory deficits are present in a substantial proportion of children with ADHD, and converging evidence links these deficits with ADHD-related behavioral and functional impairments. At the same time, working memory is not a unitary construct, and evidence is lacking regarding the role of several components of this system in ADHD. Preclinical behavioral studies are needed to fractionate the multicomponent working memory system, determine which specific subcomponent(s) are impaired in ADHD, and more importantly link these subcomponent(s) with specific ADHD-related behavioral symptoms/functional impairments. The current study reflects one piece of that puzzle, and focuses on the episodic buffer component of working memory. Across multiple testing days, a well-characterized sample of 86 children ages 8–13 (M=10.52, SD=1.54; 34 girls; 64% Caucasian/Non-Hispanic) with ADHD (n=49) and without ADHD (n=37) completed three counterbalanced working memory tests that were identical in all aspects except the key subcomponent process (phonological, visuospatial, episodic buffer). Gross motor movement during these and control tasks were measured using 4 high-precision actigraphs. There was no evidence of group differences in gender, age, SES, or IQ. Bayesian mixed-model ANOVAs indicated that the ADHD group performed significantly worse on all three working memory tests (d=1.17–1.44) and was significantly more hyperactive than controls (d=0.66–1.05) during the visuospatial and episodic buffer tests. In contrast, the ADHD and Non-ADHD groups were equivalent with regard to effects of episodic buffer demands on performance and hyperactive behavior. The most parsimonious conclusion is that the episodic buffer is likely intact in ADHD, and unrelated to ADHD hyperactivity symptoms.     

Emotion regulation through execution,observation, and imagery of emotional movements

According to Damasio’s somatic marker hypothesis, emotions are generated by conveying the current state of the body to the brain through interoceptive and proprioceptive afferent input. The resulting brain activation patterns represent unconscious emotions and correlate with subjective feelings. This proposition implies a corollary that the deliberate control of motor behavior could regulate feelings. We tested this possibility, hypothesizing that engaging in movements associated with a certain emotion would enhance that emotion and/or the corresponding valence. Furthermore, because motor imagery and observation are thought to activate the same mirror-neuron network engaged during motor execution, they might also activate the same emotional processing circuits, leading to similar emotional effects. Therefore, we measured the effects of motor execution, motor imagery and observation of whole-body dynamic expressions of emotions (happiness, sadness, fear) on affective state. All three tasks enhanced the corresponding affective state, indicating their potential to regulate emotions.     

Angry Thoughts and Daily Emotion Logs: Validity of the Angry Cognitions Scale

The Angry Cognitions Scale (ACS; Martin and Dahlen in J Ration Emot Cogn Behav Therapy 25:155–173, 2007) was designed to measure six cognitive processes related to anger: misattributing causation, overgeneralizing, catastrophizing, demandingness, inflammatory labeling, and adaptive processes. Preliminary evidence on the reliability of the ACS has been positive, demonstrating that the ACS is correlated with the experience and expression of anger, anger consequences, hostile thoughts, and responses to provocation (Martin and Dahlen in J Ration Emot Cogn Behav Therapy 25:155–173, 2007; J Ration Emot Cogn Behav Therapy, 29:65–76, 2011). This previous research, however, has suffered from limitations associated with demand characteristics and the reliance on retrospective data. The current study sought to address these limitations by using daily emotion logs. Results showed that the ACS predicted the daily experience of anger and anger related consequences, contributing to the literature on the ACS as a valuable measure of anger-related cognitions.