Stereotype performance boosts: the impact of self-relevance and the manner of stereotype activation

The activation of positive stereotypes has been shown to produce academic performance boosts. Evidence regarding the role of self-relevance in producing such effects has been mixed. The authors propose that the subtlety of stereotype activation plays a key role in creating performance boosts among targets and nontargets of stereotypes. Study 1 found that subtle stereotype activation boosted performance in targets, but blatant activation did not. Study 2 was conducted on both targets and nontargets using different methods of stereotype activation. Again, targets showed performance boosts when stereotypes were subtly activated but not when they were blatantly activated. Nontargets, however, showed boosts in performance only when stereotypes were blatantly activated. The role of self-relevance in mediating sensitivity to stimuli is discussed.     

Perceptual completion in rhesus monkeys (Macaca mulatta) and pigeons (Columbia livia)

In a two-dimensional drawing, when the narrow edge of a bar appears to touch the edge of a large rectangle, humans overestimate the length of the bar (Kanizsa, 1979). Kanizsa has suggested that this illusion occurs because humans perceive the bar as continuing behind the rectangle and complete the "occluded" portion of the bar. Rhesus monkeys and pigeons were trained to classify black target bars with a variety of lengths as "long" or "short." In training, the bar was always located at the same distance from a gray box. After learning this discrimination, the subjects were tested on novel stimuli, in which the bar was located at three new locations. Monkeys showed a consistent response bias for "long" when the bar touched the box, but pigeons did not. Monkeys appear to have completed the "occluded" part like humans, whereas pigeons failed to do so. Because this procedure does not require animals to complete the "occluded" part with any particular form, their failure suggests that pigeons do not even perceive the target bar as continuing behind the "occluding" figure. The failure of pigeons may be due to difficulty in perceiving depth from two-dimensional drawings.     

Experiential purchases and prosocial spending promote happiness by enhancing social relationships

Recent research on consumption and subjective well-being has revealed that experiential purchases and prosocial spending promote happiness by enhancing the purchasers’ social relationships. This study (N = 1523) explored whether undergraduate students’ consumption behaviors during summer break would be associated with their post-break happiness, and whether the consumption–happiness relationship would be mediated by a positive influence on their social relationships. The results showed that both experiential purchases and prosocial spending during summer break were associated with greater post-break happiness, but only when these purchases had a positive influence on the purchasers’ social relationships. These effects remained significant after controlling for respondents’ personality traits, financial standing, and sex. Moreover, both experiential purchases and prosocial spending were more likely to have a positive influence on social relationships than luxury purchases. These results are congruent with the recent exposition that experiential purchases and prosocial spending promote happiness by enhancing the purchasers’ social relationships.     

The Impact of Crime on Social Ties and Civic Participation

The present study examined associations of neighbourhood crime with residents' social ties and civic participation using multilevel models. We hypothesized that crime is indirectly associated with residents' low civic participation by negatively relating to their acquaintanceship ties because of fear of neighbours. By contrast, we predicted that crime is indirectly related to frequent civic participation by positively associating with more intimate friendship ties as a response to combat external threats. Additionally, we hypothesized that high crime rates in the neighbourhood increases the importance of generalized trust towards others. Therefore, we examined the interaction effects of neighbourhood crime and trust on social ties and participation. The study is based on a postal questionnaire mailed to residents aged between 20 and 69 years, residing in Musashino City and Kiyose City, in Tokyo. Rates of larceny reported by the Tokyo Metropolitan Police Department were used as indices of neighbourhood crime. As hypothesized, our results showed that crime is positively associated with friendship ties and is negatively related to acquaintanceship ties. Through these opposing relationships, crime showed both positive and negative associations with civic participation. Moreover, we found that generalized trust buffered the adverse relationships between crime, broader social ties and participation. Copyright © 2015 John Wiley & Sons, Ltd.     

There’s no ball without noise: cats’ prediction of an object from noise

We used an expectancy violation procedure to ask whether cats could use a causal rule to infer the presence of an unseen object on hearing the noise it made inside a container and predict its appearance when the container was turned over. We presented cats with either an object dropping out of an opaque container or no object dropping out (turning-over phase) after producing either a rattling sound by shaking the container with the object inside, or no sound (shaking phase). The cats were then allowed to freely explore the experimental environment (exploration phase). The relation between the sound and the object matched with physical laws in half of the trials (congruent condition) and mismatched in the other half (incongruent condition). Inferring the presence of an unseen object from the noise was predicted to result in longer looking time in the incongruent condition. The prediction was supported by the cats’ behavior during the turning-over phase. The results suggest that cats used a causal-logical understanding of auditory stimuli to predict the appearance of invisible objects. The ecology of cats’ natural hunting style may favor the ability for inference on the basis of sounds.     

Capuchin monkeys (Cebus apella) are sensitive to others’ reward: an experimental analysis of food-choice for conspecifics

The issue whether non-human primates have other-regarding preference and/or inequity aversion has been under debate. We investigated whether tufted capuchin monkeys are sensitive to others’ reward in various experimental food sharing settings. Two monkeys faced each other. The operator monkey chose one of two food containers placed between the participants, each containing a food item for him/herself and another for the recipient. The recipient passively received either high- or low-value food depending on the operator’s choice, whereas the operator obtained the same food regardless of his/her choice. The recipients were either the highest- or lowest-ranking member of the group, and the operators were middle-ranking. In Experiment 1, the operators chose the high-value food for the subordinate recipient more frequently than when there was no recipient, whereas they were indifferent in their choice for the dominant. This differentiated behavior could have been because the dominant recipient frequently ate the low-value food. In Experiment 2, we increased the difference in the value of the two food items so that both recipients would reject the low-value food. The results were the same as in Experiment 1. In Experiment 3, we placed an opaque screen in front of the recipient to examine effects of visual contact between the participants. The operators’ food choice generally shifted toward providing the low-value food for the recipient. These results suggest that capuchins are clearly sensitive to others’ reward and that they show other-regarding preference or a form of inequity aversion depending upon the recipients and the presence of visual contact.     

Meanings of Loss Among Japanese Suicide Bereaved: Content Analysis of Open-Ended Responses1

Although the importance of meaning-making among suicide bereaved has been reported, the detailed contents of the process remain unclear. This study aimed to identify the content categories of sense-making and benefit-finding in Japanese suicide loss survivors. We conducted content analysis of responses to open-ended questions in 99 participants. The results indicated that sense-making activities comprised seven categories, including Deceased was relieved from pain and Suicide is inevitable in modern society. Benefit-finding also comprised eight categories, such as Treat others with compassion and Live one day at a time with gratitude. The implications of the results are discussed in terms of sociocultural contexts of suicide postvention.     

Three-dimensional anorthoscopic perception

When a rotating 3-D wireframe object passes behind a narrow slit, it is often perceived as a 3-D object, even though only a small portion of it is visible at any one instant. This result constitutes a new finding in connection with both anorthoscopic perception and the perception of structure-from-motion.