Inferences by exclusion in the great apes: the effect of age and species

This study investigated the ability of chimpanzees, gorillas, orangutans, and bonobos to make inferences by exclusion using the procedure pioneered by Premack and Premack (Cognition 50:347–362, 1994) with chimpanzees. Thirty apes were presented with two different food items (banana vs. grape) on a platform and covered with identical containers. One of the items was removed from the container and placed between the two containers so that subjects could see it. After discarding this item, subjects could select between the two containers. In Experiment 1, apes preferentially selected the container that held the item that the experimenter had not discarded, especially if subjects saw the experimenter remove the item from the container (but without seeing the container empty). Experiment 3 in which the food was removed from one of the containers behind a barrier confirmed these results. In contrast, subjects performed at chance levels when a stimulus (colored plastic chip: Exp. 1; food item: Exp. 2 and Exp. 3) designated the item that had been removed. These results indicated that apes made inferences, not just learned to use a discriminative cue to avoid the empty container. Apes perceived and treated the item discarded by the experimenter as if it were the very one that had been hidden under the container. Results suggested a positive relationship between age and inferential ability independent of memory ability but no species differences.This contribution is part of the special issue “Animal Logics” (Watanabe and Huber 2006).     

Enhancing Creativity With Combined Transcranial Direct Current and Random Noise Stimulation of the Left Dorsolateral Prefrontal Cortex and Inferior Frontal Gyrus

Creativity is a fundamental human accomplishment from scientific advances to composing music. The left dorsolateral prefrontal cortex (DLPFC) and inferior frontal gyrus (IFG) are important metacontrol hubs in flexibility and persistence brain states, respectively. Those hubs are related to divergent thinking, insight problem-solving, and convergent thinking. In this double-blind, between-subjects study, 81 healthy participants were randomly assigned to one of three groups (n = 27) that received a combined transcranial direct current stimulation–transcranial random noise stimulation (tDCS-tRNS) protocol with the anode over the left DLPFC and cathode over the left IFG (+DLPFC−IFG), the opposite montage (−DLPFC+IFG), and a sham group (+DLPFC−IFG). Both active tDCS-tRNS groups received 20 min of 1 mA tDCS with 1 mA (100–500 Hz) tRNS. Creativity was assessed before (baseline) and during stimulation with the Unusual Uses, Picture Completion (PC), Remote Association test (RAT), Matchstick Arithmetic (MA), and Nine-dot (ND) problems. Only the +DLPFC−IFG group had significantly higher scores compared with sham in the RAT (p = .009), PC fluency (p = .018), PC originality (p = .007), ND (p = .007), and MA (p = .032). Overall, −DLPFC+IFG had greater scores in all creativity tests compared with sham. Implications from the metacontrol theory are discussed.     

Teaching reading and spelling: exclusion and stimulus equivalence

In Experiment 1, 7 nonreading children were exposed to a program designed to teach reading of 51 training words. The program featured an exclusion-based procedure in which the children (a) matched printed to dictated words and (b) constructed (copied) printed words with movable letters and named them. All children learned to read the training words. Five children also read generalization words and showed progress in spelling. Experiment 2 applied the program to 4 different children, omitting the word-construction task. They also learned to read the training words, but only 1 participant read generalization words. The data support a stimulus equivalence account of reading acquisition and suggest that reading generalization may be obtained, especially when the teaching program includes word construction.     

校园排斥对初中生内外化问题的影响:同伴关系与核心自我评价的中介作用

该研究探讨了校园排斥和初中生内外化问题的关系,结合资源保存理论,进一步考察同伴关系（条件性资源）与核心自我评价（人格特质资源）对该效应的链式中介作用。采用青少年校园现实受排斥量表、同伴关系量表、核心自我评价量表、焦虑抑郁量表和外化行为倾向量表,对辽宁省2所中学540名初中生进行调查。结果表明：（1）校园排斥对于初中生的内化及外化问题均具有正向预测作用;（2）同伴关系、核心自我评价在校园排斥与内化问题中起完全中介作用,而在校园排斥与外化问题中起部分中介作用。具体而言,校园排斥通过三条路径影响内外化问题：一是同伴关系的单独中介作用;二是核心自我评价的单独中介作用;三是同伴关系—核心自我评价的链式中介作用。     

Witnessed inclusion improves identification of Duchenne and non-Duchenne smiles

Social exclusion threatens a person's need to belong and prompts them to behave in ways that often facilitate reaffiliation. For adults, direct exclusion increases attention to social information and facial cues, including an enhanced identification of Duchenne and non-Duchenne smiles. Furthermore, inclusion can buffer or mitigate the effects of exclusion. This study investigated children's (N = 44) and adults’ (N = 52) sensitivity to perceptual changes in smiles following witnessed inclusion and exclusion and inclusion's mitigating and buffering effects on perceptual abilities. Contrary to our predictions, participants in our study demonstrated improved accuracy after witnessing inclusion, rather than exclusion, and showed no buffering or mitigating effects of inclusion. This contradiction with previous findings points to a further need to explore the effects of witnessed versus direct inclusion and exclusion, especially if witnessed inclusion and exclusion have the ability to impact perception and shape our behavior.     

The Bishops of the Protestant Episcopal Church and Birth Control

Summary

Some effects of the time incarcerated on the values and sociometric choices of 107 young inmates at a federal correctional institution were assessed. The longer an inmate was incarcerated, the less were his values like those that the prison staff attributed to an ideal inmate. Values showing decreasing acceptance over time by the inmates were religiousness, honesty, achievement, and kindness, while independence and loyalty increased. There was little evidence for a change toward socially acceptable values as the inmates neared release, in contrast to the results of other investigations. One of the sociometric measures, however, showed that inmates tended increasingly to choose staff as peers, as release time approached.     

Psychological and Neuroendocrine Reactivity to Ostracism

This study used the ostracism detection theory to investigate how ostracism impacts individuals in two ways: (1) immediate poststressor needs, mood, ruminative thoughts, and desire to affiliate, and (2) short‐term affective and cortisol reactivity. A total of 58 college students were randomly assigned to the inclusion or ostracism conditions of Cyberball, a virtual ball‐tossing game. Immediately following the experimental manipulation, ostracized participants reported more thwarted psychological need states, more negative mood, and fewer positive ruminative thoughts, relative to their included counterparts. Ostracized participants reported a greater interest in affiliating with others in online or in‐person settings. In the short‐term, ostracized males reported more hostility than included males, although the scores were within expected norms for most males. There was no relation between Cyberball condition and gender across time for depression, anxiety, or positive affect. Approximately 20 min after the onset of the stressor, women in the luteal phase and women taking oral contraceptives in the ostracized group displayed higher cortisol than their counterparts in the included group. Relative to baseline, however, cortisol did not reliably increase after the onset of the stressor. Ostracized females taking oral contraceptives showed the greatest decline in cortisol, compared to included oral contraceptive users. Overall, results suggest that most of the negative effects of ostracism are immediate and limited to psychological, not neuroendocrine, responses.     

Children’s developing views of social excluders: A dissociation between social evaluation and partner preference

When facing social exclusion, children seek to strengthen existing social connections and form new ones. This study asked whether they also make strategic choices about the targets of their affiliative goals. Three- to six-year-olds (N = 69; 36 female; mostly non-Hispanic White) observed characters acting inclusively or exclusively. All ages viewed excluders more negatively than includers, but only five- and six-year-olds preferred includers as play partners. Despite easily detecting and remembering exclusion events, younger children expressed no play partner preference. Children's verbal justifications revealed that older children choose partners more carefully and draw on a richer understanding of exclusion. More generally, the initial dissociation between social evaluation and preference formation underscores that these are distinct processes with different developmental trajectories.     

The moderating role of attachment insecurities in the association between social and physical pain

We examined the effects of social exclusion and attachment insecurities (anxiety, avoidance) on physical pain sensitivity, hypothesizing that anxiety would predict greater physical pain sensitivity only following social exclusion. Participants were either included in or excluded from a computer-based ball-tossing game and then completed a coldpressor task. Anxious men showed greater physical pain sensitivity when excluded, but not when included. Moreover, individuals (men and women) high on both anxiety and avoidance showed greater physical pain sensitivity when excluded, but not when included. Conclusions: Anxious individuals’ heightened physical pain sensitivity following exclusion is a manifestation of hyperactivation of their attachment systems, and when threatened, avoidant individuals who are also high in anxiety are less successful in deactivating their attachment systems.     

Not in My Backyard! Authoritarianism,Social Dominance Orientation,and Support for Strict Immigration Policies at Home and Abroad

Many controversial immigration policies have recently emerged across the United States and abroad. We explore the role of national context in shaping support for such policies. Specifically, we examine whether the extent to which ideological attitudes—Right‐Wing Authoritarianism (RWA) and Social Dominance Orientation (SDO)—predict policy support is moderated by the national context of the policy. Across three studies, United States citizens read about a controversial immigration policy affecting either their own country (United States) or a foreign country (Israel or Singapore) and indicated their support for the policy. Results reveal that SDO predicts policy support, regardless of its national context; this effect is mediated by perceived competition. Conversely, RWA predicts policy support only if the policy affects domestic immigration; this effect is mediated by perceptions of cultural threat. Consistent with prior research, the present findings highlight the role of perceived cultural threat to one's ingroup and perceived competition in shaping attitudes toward immigration and shed light on some of the motivations underlying the recent rise in popularity of strict immigration policies.