A Longitudinal Assessment of the Associations Among Response Access, Attention Problems, and Aggression during Childhood

Children with ADHD symptoms often display social competence deficits, yet mechanisms for their social difficulties remain unclear. Using data from the normative sample of non-intervention respondents (N?=?387; 50 % male; 49 % non-European-American; age at initial assessment: M?=?6.5 years, SD?=?0.48) in the Fast Track project (Lochman and CPPRG Journal of Consulting and Clinical Psychology 63:549–59, 1995), the social-information processing ability of accessing responses for social situations was modeled across four time points from kindergarten to third grade. Teacher-rated aggression and ADHD symptoms were included as predictors of the intercept and slope. Low ADHD symptoms were associated with a decline in aggressive responses across childhood, whereas high ADHD symptoms were linked to an increase in aggressive responses that decelerated between second and third grade. Regarding competent responses, low ADHD symptoms predicted increases in competent responses, but this increase decelerated between second and third grade. High ADHD symptoms were also associated with a slight increase in competent responses into first grade, but competent responses decreased from first to third grade. Neither aggression nor the interaction of ADHD symptoms and aggression accounted for a significant amount of variance in aggressive or competent responses. Future research should identify if differences in response access associated with high and low ADHD symptoms link to difficulties making and keeping friendships.     

When motivation backfires: Optimal levels of motivation as a function of cognitive capacity in information relevance perception and social judgment

Motivation and cognitive capacity are central variables in major models of social judgment and persuasion. However, the exact nature of their interplay in judgment processes has remained ambiguous. The present paper reports on two experimental studies tackling this issue. In Study 1 we demonstrated a cross-over pattern of means for the interaction effect of motivation and cognitive capacity on judgment, with high motivation being beneficial under high cognitive capacity but detrimental under low cognitive capacity. This effect was explained by the participants’ subjective perception of information relevance. In Study 2, the role of information relevance was further investigated, showing that for highly motivated participants, judgment was differently affected by information with low versus high relevance when cognitive capacity was high but not when it was low. In the discussion, we elaborate on these effects, advocating a more dynamic perspective on (social) judgment, acknowledging the conditional (opposite) effects of motivation, in function of cognitive capacity.     

Illusory correlation,group size and memory

Two studies were conducted to test the predictions of a multi-component model of distinctiveness-based illusory correlation (IC) regarding the use of episodic and evaluative information in the production of the phenomenon. Extending on the standard paradigm, participants were presented with 4 groups decreasing in size, but all exhibiting the same ratio of positive to negative behaviours. Study 1 (N = 75) specifically tested the role of group size and distinctiveness, by including a zero-frequency cell in the design. Consistent with predictions drawn from the proposed model, with decreasing group size, the magnitude of the IC effect showed a linear increase in judgments thought to be based on evaluative information. In Study 2 (N = 43), a number of changes were introduced to a group assignment task (double presentation, inclusion of decoys) that allowed a more rigorous test of the predicted item-specific memory effects. In addition, a new multilevel, mixed logistic regression approach to signal-detection type analysis was used, providing a more flexible and reliable analysis than previously. Again, with decreasing group size, IC effects showed the predicted monotonic increase on the measures (group assignment frequencies, likability ratings) thought to be dependent on evaluative information. At the same time, measures thought to be based on episodic information (free recall and group assignment accuracy) partly revealed the predicted enhanced episodic memory for smaller groups and negative items, while also supporting a distinctiveness-based approach. Additional analysis revealed that the pattern of results for judgments though to be based on evaluative information was independent of interpersonal variation in behavioral memory, as predicted by the multi-component model, and in contrast to predictions of the competing models. The results are discussed in terms of the implications of the findings for the proposed mechanisms of illusory correlation.     

Volunteering Among Latter‐Day Saints

In this article, we shed light on the volunteering behaviors of Latter‐Day Saints (Mormons). While some information was known about this group and its volunteering practices, detailed and reliable data were not available. This is the first study by a secular research institution to be given permission by the church to collect data within Latter‐Day Saint congregations. We found a high rate of volunteering by almost all members, which was mostly, but not only, for religious purposes. About half the volunteering comes from fulfilling “callings,” while members initiate the other half. We found variations in volunteering based on the studied regions, age, income, education, gender, and generational membership. These findings provide the first reliable and detailed information regarding Latter‐Day Saint volunteering and may serve as a springboard for future research on the pro‐social behaviors of various religious groups.     

Predicting Young Drivers' Car Crashes: The Role of Music Video Viewing and the Playing of Driving Games. Results from a Prospective Cohort Study

The aim of the study is to examine whether the playing of driving games and the viewing of music videos during adolescence predict crash involvement in emerging adulthood. A prospective cohort study (N = 471) with a five-year interval was used to measure adolescents' gender, media use, personality characteristics (baseline measurement), and crash involvement (follow-up). At baseline measurement (2006), respondents were 17 or 18 years old and did not yet have their driver's license. Data were analyzed by means of logistic regression analyses and the calculation of attributable risks. Respondents who watched music videos at least several times a week (OR = 4.319) or respondents who played drive'em up games at least a few times a month (OR = 3.125) had a heightened chance of being involved in a car crash five years later, even after controlling for their total media exposure, gender, and personality characteristics. Implications for prevention are discussed.     

Subspace K-means clustering

To achieve an insightful clustering of multivariate data, we propose subspace K-means. Its central idea is to model the centroids and cluster residuals in reduced spaces, which allows for dealing with a wide range of cluster types and yields rich interpretations of the clusters. We review the existing related clustering methods, including deterministic, stochastic, and unsupervised learning approaches. To evaluate subspace K-means, we performed a comparative simulation study, in which we manipulated the overlap of subspaces, the between-cluster variance, and the error variance. The study shows that the subspace K-means algorithm is sensitive to local minima but that the problem can be reasonably dealt with by using partitions of various cluster procedures as a starting point for the algorithm. Subspace K-means performs very well in recovering the true clustering across all conditions considered and appears to be superior to its competitor methods: K-means, reduced K-means, factorial K-means, mixtures of factor analyzers (MFA), and MCLUST. The best competitor method, MFA, showed a performance similar to that of subspace K-means in easy conditions but deteriorated in more difficult ones. Using data from a study on parental behavior, we show that subspace K-means analysis provides a rich insight into the cluster characteristics, in terms of both the relative positions of the clusters (via the centroids) and the shape of the clusters (via the within-cluster residuals).     

An Environmental Enrichment Programme to Promote Adaptive Responding in Two Children with Multiple Disabilities

Abstract

An environmental enrichment programme was used for two passive children who had visual and hearing impairments and profound intellectual disabilities. The enrichment items, selected through stimulus preference assessments, were accessible contingent on simple adaptive responses. Data showed that both children increased their adaptive responding (thus reducing their passivity) during the programme. Implications of the findings are discussed.     

Low‐price guarantees as advertisement strategy and compensation policy: The more,the better?

Companies sometimes employ a “lowest price or more than the difference back” policy (i.e., a price‐beating guarantee). We investigated whether such a policy is more effective to attract and retain customers than when the exact price difference is promised (i.e., a price‐matching guarantee). The first study revealed that about 60% of the marketers and shop owners in our sample thought that beating price differences is a more effective strategy than matching price differences. However, the four subsequent studies challenged this assumption. Specifically, the advertisement as well as the provision of price‐beating refunds did not have an incremental positive effect on customers' general attitudes in terms of trust, brand perception, loyalty, and shopping intentions beyond the level that was already reached by price‐matching refunds. Moreover, our mediation analyses revealed that the null effect of price‐matching versus price‐beating was mediated by fairness perceptions. From a theoretical perspective, these results are in line with a fairness account, which holds that people do not only evaluate the economic value of an outcome, but also take equality considerations into account. Because price‐beating is literally more expensive than price‐matching, from a practical point of view, companies should be informed that the employment of a price‐beating guarantee is a cost‐ineffective advertisement strategy and compensation policy.