Distractor effect on the latent inhibition of conditioned flavor aversion in rats

Using a conditioned flavor aversion procedure with rats as subjects, the effect of the addition of a distractor stimulus on the magnitude of the latent inhibition effect was examined. Experiment 1 showed that latent inhibition to vinegar was attenuated by the addition of sucrose during preexposure. On the other hand, sucrose added during conditioning to vinegar did not attenuate latent inhibition. It was also found that the degree of latent inhibition to the vinegar-sucrose compound solution was less when vinegar alone was preexposed (i.e., when sucrose was added only during conditioning) than when the compound solution was preexposed (i.e., when sucrose was added both during preexposure and during conditioning). Experiment 2 gave similar results but with sucrose assigned as the target flavor and vinegar as the distractor. These findings are in full agreement with the generalization decrement account of latent inhibition.     

The effects of preexposure-test and conditioning-test intervals on the magnitude of latent inhibition

Using the conditioned taste aversion paradigm, two experiments were conducted to examine the effects of the interval between preexposure and test and that between conditioning and test on the magnitude of latent inhibition. Experiment 1 revealed that the degree of latent inhibition was attenuated when rats were given a 21‐day interval between preexposure and test. It was also found that this attenuation was more marked in subjects which were given conditioning immediately after preexposure than those which were conditioned shortly before the test. Retention interval between preexposure and test was reduced to 12 days in Experiment 2, and exactly the same pattern of results as those found in Experiment 1 was obtained. These findings suggest that the memory of conditioning as well as that of preexposure decreases its retrievability after a long retention interval, although the former is more retainable than the latter.     

Context Sensitivity in Canadian and Japanese Children’s Judgments of Emotion

Previous studies showed that East Asians are more sensitive than North Americans to contextual information, and that the cultural differences in context sensitivity emerge in preschool children. Yet, little is known about whether this generalizes to children’s emotional judgments. The present study tested Canadian and Japanese preschool children and examined cross-culturally the extent to which facial expressions of surrounding people influence judgments of a target person’s emotion. Japanese children were more likely than Canadian children to judge an emotionally-neutral target as more negative (positive) when the background emotion was negative (positive), demonstrating an assimilation effect. Canadian children, however, showed a contrast effect: judging the target person’s neutral emotion as more negative when the background emotion was positive. These data extend extant understanding of emotion recognition by illuminating nuances in perceptual processes across developmental and cultural lines.     

Context dependency of conditioned aversions to familiar and novel fluids

Using a context discrimination procedure and rats as the subjects, the formation of context-dependent aversions to novel and familiar fluids was investigated. Experiment 1 revealed that context dependency could be established to a novel fluid (saccharin) after three cycles of context discrimination training and that the acquired context dependency was revealed also to a second familiar fluid (water) presented in the following test. Experiment 2 showed that the formation of the context-dependent aversion and its transfer to a second fluid was not affected by whether fluid presented during discrimination was novel (saccharin) or familiar (water). Experiment 3 demonstrated that when the same water was given both in the two training contexts and in the home cages of the subjects during discrimination, the context-dependent aversion formed was specific to it. These findings can be explained in terms of a simple summation effect of fluid-nausea and context-nausea associations.     

Residential mobility and conditionality of group identification

In three studies, we found that residential mobility accounts for cross-national, regional, and individual differences in the conditionality of identification with a group. In Study 1, participants from a mobile nation (US) showed more conditional identification with other group members than did participants from a stable nation (Japan). In Study 2, we found within-nation, regional variation in this tendency. Specifically, in residentially stable Japanese cities, the attendance to home baseball games was higher when the team was performing well than when it was performing poorly. In contrast, the attendance to the home games was not associated with the team’s performance. Finally, in Study 3 we found individual differences in the conditionality of group identification, such that frequent movers identified with the school more than non-movers did when the school was described favorably, whereas they distanced themselves from the school more than non-movers when their school was described unfavorably. These findings illustrate the role of residential mobility in individual, regional, and cross-national differences in the conditionality of group identification.     

Backgrounds of higher suicide rates among "name university" students: a retrospective study of the past 25 years

Cases from the past 25 years of 143 students who committed suicide at Kyoto University, a "name university" in Japan since 1956, were investigated retrospectively. Then the total trends of the suicide rate were reexamined in comparison with a control group, and the recent trends after the student strife (1970) were confirmed in comparison with the 15-year period before the strife. Thus, using a longer time span, the total pattern of suicide could be reidentified as the "performance type" within an "achievement-oriented culture." Seemingly healthy students from normal homes have suddenly committed suicide in this recent "pupa within a cocoon" syndrome, resulting from "unbalanced personality development" in the context of modern mass higher education.     

Links between real and virtual networks: a comparative study of online communities in Japan and Korea.

The present study explores how online communities affect real-world personal relations based on a cross-cultural survey conducted in Japan and Korea. Findings indicate that the gratifications of online communities moderate the effects of online communities on social participation. Online communities are categorized into a real-group-based community and a virtual-network-based community. The membership of real-group-based online community is positively correlated with social bonding gratification and negatively correlated with information- seeking gratification. Japanese users prefer more virtual-network-based online communities, while their Korean counterparts prefer real-group-based online communities. Korean users are more active in online communities and seek a higher level of socializing gratifications, such as social bonding and making new friends, when compared with their Japanese counterparts. These results indicate that in Korea, personal relations via the online community are closely associated with the real-world personal relations, but this is not the case in Japan. This study suggests that the effects of the Internet are culture-specific and that the online community can serve a different function in different cultural environments.     

Positive emotions have different impacts on mood and sympathetic changes in crying from negative emotions

Motivation and Emotion - Emotional crying has been extensively discussed but has concentrated on crying as a result of negative emotion. There are few psychological and neurophysiological findings...