Cooperation in Asymmetric Social Dilemmas When Equality Is Perceived as Unfair1

Three experiments examined the hypothesis that in an asymmetric social dilemma, perceived fairness of the distribution promotes cooperation. In support of the hypothesis, Studies 1 and 2 showed that willingness to voluntarily and anonymously pay for child care was related to ratings of perceived fairness of equal and equitable distributions of the quality of child care when it was a public good (provided by the municipality) or a market good (provided by a private business). Study 1 also showed that an equal distribution of the public good was perceived to be fairer than an equal distribution of the market good, whereas the reverse was true for an equitable distribution. Study 2 showed that when quality differences were explicit, an equitable distribution was perceived as fairer than an equal distribution. Study 3 showed that an equitable distribution of quantity of child care was perceived to be fairer and increased willingness to pay as compared to an equal distribution.     

Pure correlates of exploration and exploitation in the human brain

Balancing exploration and exploitation is a fundamental problem in reinforcement learning. Previous neuroimaging studies of the exploration–exploitation dilemma could not completely disentangle these two processes, making it difficult to unambiguously identify their neural signatures. We overcome this problem using a task in which subjects can either observe (pure exploration) or bet (pure exploitation). Insula and dorsal anterior cingulate cortex showed significantly greater activity on observe trials compared to bet trials, suggesting that these regions play a role in driving exploration. A model-based analysis of task performance suggested that subjects chose to observe until a critical evidence threshold was reached. We observed a neural signature of this evidence accumulation process in the ventromedial prefrontal cortex. These findings support theories positing an important role for anterior cingulate cortex in exploration, while also providing a new perspective on the roles of insula and ventromedial prefrontal cortex.     

Emotional Well-Being Related to Time Pressure,Impediment to Goal Progress,and Stress-Related Symptoms

We propose that emotional well-being in everyday life is partially related to the balance of positive and negative affect associated with everyday routine activities. Factors that interfere with positive affect associated with such activities would therefore have negative impacts on emotional well-being. Supporting that time pressure is one such factor, we find in Study 1 for a representative sample of Swedish employees (n = 1507) answering a survey questionnaire that emotional well-being has a negative relationship to time pressure. In Study 2 we test the hypothesis that the negative effect of time pressure on emotional well-being is jointly mediated by impediment to goal progress and time stress. In another survey questionnaire a sample of Swedish employees (n = 240) answered retrospective questions about emotional well-being at work and off work, experienced impediment to goal progress, experienced time pressure, and stress-related symptoms. Statistical mediation analyses supported the proposed hypothesis.     

Does It Make You Happy Feeling This Way? A Core Affect Account of Preference for Current Mood

Two experiments were conducted to investigate whether and how preference for current mood is related to the valence and activation dimensions of core affect. In Study 1, 100 undergraduates rated valence and activation of their naturally occurring current mood and preference for this mood. In Study 2, another 90 undergraduates performed the same ratings for various induced moods. The results showed as expected that preference for current mood is related to both valence and activation. Whereas the relation to valence is direct, the relation to activation is invertedly U-shaped with a maximum that increases with valence.     

A multidimensional measure of neighboring

The study reports the development of a short and easily administered questionnaire aiming at measuring dimensions of social life within neighborhoods. Principal-components analysis consistently extracted four factors replicated in three independent samples (N=96 to 1,060). The factors emerged as theoretically meaningful dimensions tapping the concepts of supportive acts of neighboring, neighbor annoyance, neighborhood attachment, and weak social ties. Factor invariance and factor replicability were high. Internal consistency, test-retest reliability, and construct validity yielded acceptable results. The principal virtue of the measure is that it may be applied to discern qualitative differences between neighborhoods by simultaneous assessments of several dimensions of neighboring. This research was financially supported by The Norwegian National Research Council. We thank Jostein Rise for valuable comments, and David R. Jacobs, Jr., and Melanie Young for advice in translating the questionnaire.     

The role of planning for intention-behavior consistency

Two studies investigated how planning affects intention-behavior consistency. In Study 1 an experimental group and control group which each consisted of 14 undergraduates were requested in computerized interviews to indicate which activities they intended to perform on the following day. Subjects in the experimental group were also requested in a second phase of the interviews to specify when and where they intended to perform the activities. The results showed that activities for which time and place had been specified were more likely to be performed. In Study 2 another 75 undergraduates volunteered to participate in an experiment in which they were requested to perform an activity (reporting mood effects of reading a prose excerpt) by themselves on one of three following days. One group of subjects only agreed to perform the activity, another group agreed to perform the activity as well as indicated when and where they would do it, and a third group in addition to this indicated which other activities they would perform on the same day. In support of the hypothesis that planning an activity increases the likelihood that it will be performed, the results showed that subjects who indicated other activities more frequently performed the target activity. More efficient time management resulting from planning may account for the findings, although further research is needed to show this conclusively.     

Spill‐over effects of intermittent costs for defection in social dilemmas

This research investigates the role of intermittent monetary costs in restraining individuals from defection in social dilemmas. In Experiment 1, 104 car owners made fictitious choices between a slow and a fast travel mode in the context of a continuous social dilemma. There were four different conditions of monetary costs for choosing the fast mode (defection): no cost, low cost, high cost to self, or high cost to others. Participants defected most when there was no cost and least when they themselves were charged a high cost. A spill‐over effect was obtained such that when others were charged a high cost to defect, defection rates were lower than under no cost. Experiment 2 used 36 undergraduates as participants in an iterated decision task with real groups. The results replicated the major results of Experiment 1. Furthermore, whereas prosocials were strongly affected by intermittent costs for defection (i.e. showed large spill‐over effects), proselfs seemed to be unaffected. Possible explanations of this interaction effect between social value orientation and intermittent punishment for defection are provided. Copyright © 2002 John Wiley & Sons, Ltd.     

Age-Related Differences in Identity Style: A Cross-Sectional Analysis

The Identity Style Inventory–Revised for a Sixth-Grade Reading Level (ISI-6G) was administered to samples of community college students (N = 99) and middle school and high school students (N = 320). Tests of between-groups differences indicated that the college sample had a significantly lower mean diffuse-avoidant score on the ISI-6G than the middle and high school sample. In terms of actual assignment to identity styles, college students were significantly more likely to be classified as informational or normative, while the younger students were more likely to be diffuse-avoidant. The mean ages of participants for each of the three identity styles were compared, and it was found that diffuse-avoidant participants had the lowest mean age (15.54 years), while individuals with an informational orientation had the highest mean age (17.20 years). Results suggest that, in general, identity style evolves with age and maturity and the general trajectory or progression involves movement away from a diffuse-avoidant orientation. Findings are discussed in terms of current knowledge of neurocognitive development during adolescence and early adulthood.     

Stated reasons for reducing work-commute by car

A survey is reported that requested work-commuters by car to state reasons that would make them reduce car use for the work commute. All participants (n = 1218) were employed by companies located in the center of a medium-size Swedish city (pop. 82,000). Among 76% of the car users (n = 602) who stated any reasons, the most frequent were improved public transport and work from home some days. Shorter travel times, an increased frequency of service and lower fares were the most frequent reasons for increasing public transport use.