Can chimpanzee infants (Pan troglodytes) form categorical representations in the same manner as human infants (Homo sapiens)?

We directly compared chimpanzee infants and human infants for categorical representations of three global-like categories (mammals, furniture and vehicles), using the familiarization-novelty preference technique. Neither species received any training during the experiments. We used the time that participants spent looking at the stimulus object while touching it as a measure. During the familiarization phase, participants were presented with four familiarization objects from one of three categories (e.g. mammals). Then, they were tested with a pair of novel objects, one was a familiar-category object and another was a novel-category object (e.g. vehicle) in the test phase. The chimpanzee infants did not show significant habituation, whereas human infants did. However, most important, both species showed significant novelty-preference in the test phase. This indicates that not only human infants, but also chimpanzee infants formed categorical representations of a global-like level. Implications for the shared origins and species-specificity of categorization abilities, and the cognitive operations underlying categorization, are discussed.     

Language and cognitive shifting: evidence from young monolingual and bilingual children

The relationship between language and cognitive shifting in young children was examined. Specifically, second language experiences from infancy as well as individual differences in monolingual language experience may affect performances on the Dimensional Change Card Sort Task. 54 Japanese-French bilingual children and two groups of Japanese monolingual children participated (ns = 18). One monolingual group was matched to the bilingual group on verbal ability and chronological age (VC monolingual group) and the other group was matched by chronological age but had higher verbal ability (C monolingual group). The results showed that the groups of children who were bilingual and monolingual with higher verbal ability performed the task significantly better than matched monolingual children. Language experiences may affect cognitive set shifting in young children.     

Executive Function in Young Children and Chimpanzees (Pan troglodytes): Evidence From a Nonverbal Dimensional Change Card Sort Task

In this article the authors compared chimpanzees’ executive function with that of children. They developed a nonverbal dimensional change card sorting task, which indexed the development of executive function. Three pairs of mother and offspring chimpanzees and 30 typically developed 5-year-old children were presented with 2 target stimuli and a test stimulus comprising 2 dimensions (size and shape) on a display; they were required to sort the test stimulus according to 1 dimension (e.g., shape). After 5 consecutive correct trials, the participants had to sort the test stimulus according to the other dimension (e.g., size). The results showed that the chimpanzees often failed to sort the test stimuli according to the first and reversed dimensions. On the other hand, the children were correctly able to use both dimensions. These results indicate that chimpanzees may have less developed executive skills than children.     

East–West cultural differences in context‐sensitivity are evident in early childhood

Accumulating evidence suggests that North Americans tend to focus on central objects whereas East Asians tend to pay more attention to contextual information in a visual scene. Although it is generally believed that such culturally divergent attention tendencies develop through socialization, existing evidence largely depends on adult samples. Moreover, no past research has investigated the relation between context‐sensitivity and other domains of cognitive development. The present study examined children in the United States and Japan (N = 175, age 4–9 years) to investigate the developmental pattern in context‐sensitivity and its relation to executive function. The study found that context‐sensitivity increased with age across cultures. Nevertheless, Japanese children showed significantly greater context‐sensitivity than American children. Also, context‐sensitivity fully mediated the cultural difference in a set‐shifting executive function task, which might help explain past findings that East Asian children outperformed their American counterparts on executive function.     

Associations between job burnout and self-efficacy: a meta-analysis

Background and Objectives: This study aimed at systematically reviewing and meta-analyzing the strength of associations between self-efficacy and job burnout (the global index and its components). We investigated whether these associations would be moderated by: (a) the type of measurement of burnout and self-efficacy, (b) the type of occupation, (c) the number of years of work experience and age, and (d) culture. Design and Methods: We systematically reviewed and analyzed 57 original studies (N?=?22,773) conducted among teachers (k?=?29), health-care providers (k?=?17), and other professionals (k?=?11). Results: The average effect size estimate for the association between self-efficacy and burnout was of medium size (?.33). Regarding the three burnout components, the largest estimate of the average effect (?.49) was found for the lack of accomplishment. The estimates of the average effect were similar, regardless of the type of measures of burnout and self-efficacy measurement (general vs. context-specific). Significantly larger estimates of the average effects were found among teachers (compared to health-care providers), older workers, and those with longer work experience. Conclusions: Significant self-efficacy–burnout relationships were observed across countries, although the strength of associations varied across burnout components, participants' profession, and their age.     

Improvement of nonverbal behaviour in Japanese female perfume‐wearers

The present study addressed the issue of whether people who use perfume improve their “visual” interpersonal impression. This expectation comes from the possibility that those who wear perfume may modify their nonverbal behaviour through positive mood changes generated by the pleasant odour of perfume or through an increase of public self‐consciousness. Thirty‐one Japanese females were assigned to either a perfume or a no‐perfume group. A screening test held in advance confirmed that all the participants in the perfume group preferred the smell of the perfume used in this study. They participated in an interview and answered questions asked by a female confederate. In the middle of the interview, the interviewees in the perfume group put on the perfume. The improvement of their nonverbal behaviour in the latter half of the interview was evaluated by 18 neutral observers, who watched silent video clips of the interviews. The observers were not informed that some of the interviewees used perfume. The results of observer ratings showed that the interviewees in the perfume group showed significantly less nonsymbolic movement (touching their hair or nose, or shifting their posture such as rotating on a swivel chair) when wearing perfume. Analysis of the video clips showed that the interviewees in the perfume group decreased their nonsymbolic movement for about 6 s per minute after putting on the perfume. The female observers also rated the interviewees in the perfume group as more self‐confident. These findings suggest that wearing perfume inhibits behaviours that project negative impressions. Analysis of the subjective mood showed that the inhibition of an interviewee's nonsymbolic movement might have resulted from a wearer's positive mood change. Although several methodological issues limit the conclusions drawn from these results, the present study showed that wearing perfume has the potential to cause changes in nonverbal behaviour and to improve visual impressions.     

Self-motion perception compresses time experienced in return travel

It is often anecdotally reported that time experienced in return travel (back to the start point) seems shorter than time spent in outward travel (travel to a new destination). Here, we report the first experimental results showing that return travel time is experienced as shorter than the actual time. This discrepancy is induced by the existence of self-motion perception.     

The mental number line in depth revealed by vection

To explore how numbers are represented in depth in our mental space, we asked participants to sequentially speak random numbers while they observed forward/backward vection. We found that participants tended to generate larger numbers when they perceived backward self-motion. The results suggest that numerical magnitudes were topographically mapped onto our mental space from front to rear in an ascending order.     

Attentional load inhibits vection

In this study, we examined the effects of cognitive task performance on the induction of vection. We hypothesized that, if vection requires attentional resources, performing cognitive tasks requiring attention should inhibit or weaken it. Experiment 1 tested the effects on vection of simultaneously performing a rapid serial visual presentation (RSVP) task. The results revealed that the RSVP task affected the subjective strength of vection. Experiment 2 tested the effects of a multiple-object-tracking (MOT) task on vection. Simultaneous performance of the MOT task decreased the duration and subjective strength of vection. Taken together, these findings suggest that vection induction requires attentional resources.     

明清时代对王学派批判

王学在守仁盛期时便遭遇批判,由此形成明清思想的一条重要线索.继罗钦顺、陈建等王守仁同时代人以后,黄宗羲、王夫之、李贽等人,都在批评王学的基础上形成自己观点.