Presleep Suggestion Related to a Phobic Object: Successful Manipulation of Reported Dream Affect

Twenty-four female subjects with a strong dislike of snakes slept for four nonconsecutive nights in the laboratory. They were divided into four groups of six, each group receiving a different presleep suggestion on Nights 3 and 4. On Nights 2, 3, and 4, before sleep, the subjects saw but did not have to touch a live snake and their dreams were collected for each REM period. The results showed that, when compared with the subjects who received the negative affect suggestions, subjects who received positive affect suggestions had significantly higher levels of positive emotions in their dreams, rated their own dreams as more pleasant, and had significantly lower levels of anxiety, sadness, and aggression. These results support the hypothesis that presleep suggestion can be an effective technique in influencing the affective dimension of the dream.     

Improving Children's Mental Rotation Accuracy With Computer Game Playing

The authors investigated the relation between mental rotation (MR) and computer game-playing experience. Third grade boys (n = 24) and girls (n = 23) completed a 2-dimensional MR test before and after playing computer games (during 11 separate 30-min sessions), which either involved the use of MR skills (the experimental group) or did not involve the use of MR skills (the control group). The experimental group outperformed the control group on the MR posttest but not on the pretest. Boys outperformed girls on the pretest but not on the posttest. Children whose initial MR performance was low improved after playing computer games that entailed MR skills. The findings imply that computer-based instructional activities can be used in schools to enhance children's spatial abilities.     

the impacts of self-control and social bonds on juvenile delinquency in a national sample of midadolescents

This study examines the effects of self-control and social bonds on delinquent behavior in a nationally representative sample. It is proposed that both self-control and social bonds affect delinquency and that the effects of these factors interact with each other. These hypotheses were tested in a regression model controlling for race, gender, delinquent association, and illegitimate opportunity. As predicted, low self-control is positively related to juvenile delinquency while social bonds are negatively related to delinquency. Some of the interaction terms between self-control and social bonds significantly impact delinquency, suggesting that the effects of self-control and social control are interdependent.     

Inter-individual variability of forces and modular muscle coordination in cycling: A study on untrained subjects

The aim of this study was to investigate the muscle coordination underlying pedaling in untrained subjects by using the muscle synergies paradigm, and to connect it with the inter-individual variability of EMG patterns and applied forces. Nine subjects performed a pedaling exercise on a cycle-simulator. Applied forces were recorded by means of instrumented pedals able to measure two force components. EMG signals were recorded from eight muscles of the dominant leg, and Nonnegative Matrix Factorization was applied to extract muscle synergy vectors W and time-varying activation coefficients H. Inter-individual variability was assessed for EMG patterns, force profiles, and H. Four modules were sufficient to reconstruct the muscle activation repertoire for all the subjects (variance accounted for >90% for each muscle). These modules were found to be highly similar between subjects in terms of W (mean r = .89), while most of the variability in force profiles and EMG patterns was reflected, in the muscle synergy structure, in the variability of H. These four modules have a functional interpretation when related to force distribution along the pedaling cycle, and the structure of W is shared with that present in human walking, suggesting the existence of a modular motor control in humans.     

Photography as unconcealment: revisiting the idea of photographic transparency

What distinguishes photography from other visual mediums? This deceptively simple but fundamental question has been at the centre of both past and current debates on the aesthetics of photography for quite some time. In this article, I will first address the premise that this question is intrinsically ontological and unfolded in pioneering debates as a sequence of implications about photographic indexicality. I will then argue that the ontological implications of photographic indexicality have been largely overlooked in subsequent research due to scholars’ concerns with how photography appears to us rather than what photography is in itself. To this end, I will specifically examine Kendall Walton's highly contested transparency thesis and some of its rebuttals, which have exerted a sprawling influence on debates on the aesthetics of photography. I will also argue that, having been exceedingly implicit in his account, what appears as indexicality to Walton and the implications thereof with respect to the transparency argument has operated on a phenomenological level; thus, the thesis itself has failed in instances in which the problem of representation and the very existence of the medium come into play. Finally, I will suggest that indexicality can be regarded as a distinctive feature of photography only when it is considered a predicate of transparency as an interstice of ‘unconcealment’ in the Heideggerian sense that would call into question the very existence of the representation and the photographic medium.     

The affective priming effect: Automatic activation of evaluative information in memory

Abstract

Fazio, Sanbonmatsu, Powell, and Kardes (1986) argued that affect may be activated automatically from memory on the mere observation of an affect-loaded stimulus. Using a variant of the standard sequential priming paradigm, it was demonstrated that the time needed to evaluate target words as positive or negative decreased if they were preceded by a similarly valenced prime word, but increased when preceded by a prime of opposite valence. Several aspects of their procedure, however, do not warrant their conclusion concerning the unconditionality of the effect. The present research investigated the generality of this affective priming effect. In Experiment 1, it was tested whether the effect can be generalised to more complex visual material. Stimulus pairs consisted of colour slides. Subjects had to evaluate the targets as quickly as possible. In Experiment 2, the standard word-word procedure was used, but target words had to be pronounced. In both experiments, significant affective priming effects were observed, supporting Bargh, Chaiken, Govender, and Pratto's (1992) assertion that the automatic activation effect is a pervasive and relative unconditional phenomenon. Implications for theories of affect and emotion are discussed.     

Outcome interdependence shapes the effects of prevention focus on team processes and performance

Although the effects of regulatory focus on individual-level performance have often been studied, relatively little is yet known about team-level effects. Filling this void, we integrate the notion that promotion-focused individuals are concerned with progress and achievement, whereas prevention-focused individuals are concerned with security and vigilance, with the insight that team processes and performance depend on outcome interdependence (individual versus team rewards). The hypothesis that prevention-focused teams react more strongly than promotion-focused teams to differences in outcome interdependence was tested among 50 teams performing an interactive command-and-control simulation. Regulatory focus and outcome interdependence were both manipulated. The results showed that prevention-focused teams working for team rather than individual rewards reported higher work engagement and less error intolerance, coordinated more effectively, and performed better. Promotion-focused teams were not influenced by outcome interdependence. We discuss the implications of our results for theory and effective team management.     

The Relationship Between Arousal and the Remembered Duration of Positive Events

The relation between affect and retrospective duration estimation has hardly been examined. In this paper, we contribute to filling this gap by studying the influence of arousal on the remembered duration of positive events. On the basis of the contextual change model, we expected that high‐arousal positive events would be remembered as longer compared with low‐arousal positive events. To test this hypothesis, we set up a naturalistic study in which participants were asked at the end of a pleasant amusement park ride at the local fair to rate how pleasant and aroused they felt during the ride as well as to estimate the ride's duration. Feeling more aroused during a ride was associated with longer estimates of the ride's duration. Results are discussed within the framework of retrospective time estimation models. Copyright © 2013 John Wiley & Sons, Ltd.     

Child Personality as Moderator of Outcome in a School‐based Intervention for Preventing Externalising Behaviour

Studying moderators of intervention effects is essential to elucidate what works for whom. The present study investigated whether child personality moderates short‐term and follow‐up effects of an individualised preventive school‐based intervention for children with externalising behaviour. The sample consisted of 48 schools, with 264 fourth‐grade children displaying externalising behaviour (M_age = 10.2 years), randomly assigned to the intervention (n = 191) or no intervention control (n = 73) condition. Teachers and children reported at pretest, posttest and follow‐up test about reactive and proactive aggression. Child personality was assessed by teachers at pretest. Child conscientiousness moderated short‐term intervention effects, indicating that more organised and planful children benefited more from the intervention. Child extraversion moderated both short‐term and follow‐up intervention effects, with low extraverted children showing larger effects. These results affirm the importance of including personality as moderator of intervention effects in future studies, as interventions adapted to specific child traits might yield larger effects. Copyright © 2012 John Wiley & Sons, Ltd.