Full versus divided attention and implicit memory performance

Effects of full and divided attention during study on explicit and implicit memory performance were investigated in two experiments. Study time was manipulated in a third experiment. Experiment 1 showed that both similar and dissociative effects can be found in the two kinds of memory test, depending on the difficulty of the concurrent tasks used in the divided-attention condition. In this experiment, however, standard implicit memory tests were used and contamination by explicit memory influences cannot be ruled out. Therefore, in Experiments 2 and 3 the process dissociation procedure was applied. Manipulations of attention during study and of study time clearly affected the controlled (explicit) memory component, but had no effect on the automatic (implicit) memory component. Theoretical implications of these findings are discussed.     

The moral maze: Dutch Salafis and the construction of a moral community of the faithful

The Salafi movement presents itself as a moral guardian of Muslims in a world that, according to many, is filled with moral crisis, temptations and anti-Islam tendencies. Salafis claim that it is essential to return to the community of the pious forefathers seen as the most outstanding community of all times with the highest absolute moral standard. In this article I will show how individual participants engage with this idea of a moral community of believers yet remain vulnerable to the ambiguities and ruptures inherent in everyday life and within the Salafi movement. By exploring how Salafis passionately try to search for the ‘correct’ knowledge and strive to maintain a unity between knowledge, conviction and behavior, and the role of friendships therein, I argue that Salafism does not remain separate from the troubles of everyday but that these issues enter into and exist in Salafi thought and practice, not by being resolved but by being transformed into personal struggles. These ambiguities and ruptures may cause problems but also provide an incentive for Salafis to continuously work at the self-improvement of one’s piety, authenticity, and sisterhood and brotherhood.     

Gestures in Instructional Animations: A Helping Hand to Understanding Non‐human Movements?

Recent research on dynamic visualizations suggests that these visualizations are effective for learning human movements such as knot tying or paper folding. Using embodied theories of cognition, this study investigated whether learning non‐human movements from a dynamic visualization can also be enhanced by grounding these movements in the learner's motor system. University students viewed an animation on lightning formation, and followed the animation's movements with gestures, saw an on‐screen human hand follow the movements or saw an arrow follow the movements. Results showed that observing an on‐screen human hand following the movements in the animation, but not actually performing these movements, enhanced retention and transfer performance compared with watching the animation without gestures. This suggests that observation of human hand movement in animation‐based instruction, which plays an important role in learning of procedural‐motor tasks, can also improve people's learning from other dynamic systems. Copyright © 2013 John Wiley & Sons, Ltd.     

Optimal Scaling of Interaction Effects in Generalized Linear Models

This study involved two phases: first, when classification was based on the calibration sample; and second, in a cross-validation setting. Computer generated data were used. Results obtained from rules based on probabilities of group membership were compared for accuracy when classifying in the discriminant space and in the predictor variable spaces. In the first phase accuracy was greater in the predictor variable spaces, while the reverse was true in the second phase. In general, rules based on probabilities of group membership were approximately equally accurate and more accurate than a rule related to a multiple regression analysis. Other findings are also discussed.     

Estimating Independent Locally Shifted Random Utility Models for Ranking Data

We present a mixed-effects location scale model (MELSM) for examining the daily dynamics of affect in dyads. The MELSM includes person and time-varying variables to predict the location, or individual means, and the scale, or within-person variances. It also incorporates a submodel to account for between-person variances. The dyadic specification can accommodate individual and partner effects in both the location and the scale components, and allows random effects for all location and scale parameters. All covariances among the random effects, within and across the location and the scale are also estimated. These covariances offer new insights into the interplay of individual mean structures, intra-individual variability, and the influence of partner effects on such factors. To illustrate the model, we use data from 274 couples who provided daily ratings on their positive and negative emotions toward their relationship – up to 90 consecutive days. The model is fit using Hamiltonian Monte Carlo methods, and includes subsets of predictors in order to demonstrate the flexibility of this approach. We conclude with a discussion on the usefulness and the limitations of the MELSM for dyadic research.     

Social Competence at the Playground: Preschoolers During Recess

Social interactions at the playground have been represented as a rich learning opportunity to hone and master social skills at preschool years. Specifically, all forms of social play (fantasy, role, exercise or rough‐and‐tumble) have been related to children's social competence. The main goal of this study was to examine whether it is a certain kind of social play which facilitates the development of social competence, or if it is just the opportunity for interacting during recess that provides children with an optimal environment for social learning. A total of 73 preschoolers (4–6 years old) were videotaped at the school's playground. Teachers provided assessments of children's social competence. Children's interactions at the playground were assessed through an innovative measuring method, based on radio‐frequency identification devices. The results showed a positive association between exercise play and children's social competence. In contrast with the literature, both forms of pretend play, fantasy and role play were unrelated to children's social competence. Smaller peer groups and longer interactions also demonstrated a positive association with these preschoolers' social competence. The study shows the importance of outdoor physical play for preschoolers' social success. Moreover, the study suggests that the environment in which children play has an important effect on the adaptive nature of their play. Copyright © 2016 John Wiley & Sons, Ltd.     

Parasympathetic cardio-regulation during social interactions in individuals with obesity—The influence of negative body image

Individuals with obesity in Western societies often face weight-related stigmatization and social exclusion. Recurrent exposure to prejudice and negative social feedback alters one’s behavior in future social interactions. In this study, we aimed to investigate autonomic nervous system and affective responses to social interactions in individuals with obesity. Women and men with (n = 56) and without (n = 56) obesity participated in episodes of social inclusion and social exclusion using a virtual ball-tossing game. During the experiment, heart rate was measured and parasympathetic activity (overall high-frequency power and event-related cardiac slowing) was analyzed. Our results show that in novel social interactions, women with obesity, relative to the other groups, exhibited the strongest increase in parasympathetic activity. Furthermore, parasympathetic activity was related to a more negative body image in individuals with obesity, but not in lean individuals. Additionally, women with obesity reported a stronger decrease in mood after social exclusion than did the other participants. Our results demonstrate influences of objective and subjective bodily characteristics on parasympathetic cardio-regulation during social interactions. In particular, they show behavioral and physiological alterations during social interactions in women with obesity.