Extreme malleability of preferences: Absolute preference sign changes under uncertainty

Malleability of preferences is a central tenet of behavioral decision theory. How malleable preferences really are, however, is a topic of debate. Do preference reversals imply preference construction? We argue that to claim preferences are construed, a demonstration of more extreme preference malleability than simple preference reversals is required: absolute preference sign changes within participants. If respondents value a prospect positively in 1 condition but negatively in a different condition, preferences cannot be considered stable. Such absolute preference sign changes are possible under uncertainty. In 2 incentive‐compatible experiments, we found participants were willing to pay to take part in a gamble and also demanded to be compensated to take part in a subsequent gamble with identical outcomes and probabilities. Such absolute preference sign changes within participants led to simultaneous risk aversion and risk seeking for the same risky prospect, suggesting that, at least in the domain of risky decisions, consumers' preferences are indeed malleable and construed.     

The moderating role of work pressure on the relationships between emotional demands and tension,exhaustion, and work engagement: an experience sampling study among nurses

The purpose of this study is to examine the moderating role of state work pressure (conceived as a hindrance demand) on the relationships between situational emotional demands (conceived as a challenge demand) and tension, emotional exhaustion and work engagement within nursing while considering job resources as covariates. Ninety-seven nurses from two German hospitals provided 1026 measurements. Multilevel analyses indicated a significant Work Pressure × Emotional Demands interaction for emotional exhaustion, with high situational work pressure exacerbating the positive association between state emotional demands and emotional exhaustion. Furthermore, work pressure moderated the relationship between emotional demands and vigour: state emotional demands related negatively to vigour only when work pressure was higher than usual, while the relationship was non-significant when work pressure was lower than usual. For dedication, similar results were obtained: state emotional demands were negatively associated with dedication only when combined with high situational work pressure; with low situational work pressure, state emotional demands did not relate to dedication. Contributing to the job demands-resources literature, this study shows that there are stress-exacerbating and stress-buffering interactions between different job demands from a within-subject perspective. However, we did not find positive relationships between challenge demands and work engagement, even in the case of low situational hindrances, indicating that there are conditions for the functioning of job demands as a challenge beyond hindrances.     

Anger in Wikipedia: Perceived intentionality and threat appraisal as mediators of anger about man‐made attacks

The online encyclopedia Wikipedia has established strict guidelines for the objectivity of content. At the same time, Wikipedia includes articles on negative events, such as disasters or man‐made attacks. These events can elicit strong emotions, which in turn may spill over into Wikipedia articles. Previous research has shown that Wikipedia articles on man‐made attacks contain more anger‐related content than Wikipedia articles on disasters. Building on these findings, we aimed to investigate whether the threat that Wikipedia authors experience when they learn of an attack is relevant as a factor in explaining the anger effect. Threat is known to elicit active and engaged reactions, such as anger, which is why it is a likely explaining factor. Our research also aimed to replicate the findings from the linguistic analysis of the Wikipedia articles using controlled scenario‐based laboratory experiments. Three studies demonstrated that man‐made attacks (terrorist attack, shooting rampage) elicited more threat, more anger, and more expressions of anger‐related content in Wikipedia texts than nature‐made disasters (earthquake, flood) and man‐made disasters (train accident). Moreover, threat was relevant as a factor in explaining the effects on anger and anger‐related content in the Wikipedia texts. These mediations could be explained by the perceived intentionality of the event. This research highlights the findings that perceived intentionality and threat are relevant mediating factors for feelings and expressions of anger after man‐made attacks.     

Activity of cGMP-dependent protein kinase (PKG) affects sucrose responsiveness and habituation in Drosophila melanogaster

The cGMP-dependent protein kinase (PKG) has many cellular functions in vertebrates and insects that affect complex behaviors such as locomotion and foraging. The foraging (for) gene encodes a PKG in Drosophila melanogaster. Here, we demonstrate a function for the for gene in sensory responsiveness and nonassociative learning. Larvae of the natural variant sitter (for(s)) show less locomotor activity during feeding and have a lower PKG activity than rover (for(R)) larvae. We used rover and sitter adult flies to test whether PKG activity affects (1) responsiveness to sucrose stimuli applied to the front tarsi, and (2) habituation of proboscis extension after repeated sucrose stimulation. To determine whether the differences observed resulted from variation in the for gene, we also tested for(s2), a sitter mutant produced on a rover genetic background. We found that rovers (for(R)) were more responsive to sucrose than sitters (for(s) and for(s2)) at 1-, 2-, and 3-wk old. This was true for both sexes. Differences in sucrose responsiveness between rovers and sitters were greater after 2 h of food deprivation than after 24 h. Of flies with similar sucrose responsiveness, for(R) rovers showed less habituation and generalization of habituation than for(s) and for(s2) sitters. These results show that the PKG encoded by for independently affects sensory responsiveness and habituation in Drosophila melanogaster.     

The ideomotor principle and motor sequence acquisition: Tone effects facilitate movement chunking

Participants practiced short sequences of key presses; sequence length and response-effect mapping were the independent variables. Contingent, distinct key-effect relations were contrasted with either contingent but uniform or no response effects. In Experiment 1, tone effects were relevant as response-specific stimuli and also as effects. The sequence length effect for the tones group was reduced. In Experiment 2, participants were informed about the sequences to be executed and then given varying amounts of preparation time before the start signal. A reduction in the sequence length effect was observed, and initiation times and mean interresponse time (IRTs) were generally reduced in the tone group. Preparation time could compensate for some but not all of the latency reducing influence of the tone effects. The results are discussed with reference to ideomotor approaches to motor control, i.e., the notion that actions are represented in sensory format.     

Perfectionism in young musicians: Relations with motivation, effort, achievement, and distress

Many musicians experience anxiety and distress when performing, which has been related to perfectionism. Recent findings, however, show that only some facets of perfectionism are associated with anxiety and distress, whereas other facets are associated with positive characteristics and outcomes such as motivation and achievement. To investigate how different facets of perfectionism are related to motivation, effort, achievement, and distress in musicians, 146 young musicians completed measures of perfectionism (striving for perfection, negative reactions to imperfection, and perceived pressure to be perfect), intrinsic and extrinsic motivation, effort, achievement, and distress. Results showed that striving for perfection was associated with intrinsic motivation (intrinsic/identified reasons), higher effort, and higher achievement. Whereas perceived pressure from music teachers was also associated with intrinsic motivation (identified reasons only), negative reactions to imperfection were associated with extrinsic motivation and higher distress. The findings demonstrate that perfectionism in musicians has both positive and negative sides. While negative reactions to imperfection are clearly unhealthy, striving for perfection may be regarded as a healthy pursuit of excellence.