Visual feature binding in early infancy

How does the developing brain of the human infant solve the feature-binding problem when visual stimuli consisting of multiple colored objects are presented? A habituation--dishabituation procedure revealed that 1-month-old infants have the ability to discriminate changes in the conjunction of a familiar shape and color in two objects. However, this good earlier performance was followed by poorer performance at 2 months of age. The performance improved again at 3 months of age. Detailed analysis of the oculomotor behaviors revealed that the age of 2 months was a period of drastic transition when the tendency to stay with the fixated objects disappeared and repetitive saccades between the two objects emerged. Our findings suggest that the ability to perceive conjunctions of features is available to infants very early, that the perceptual/neural basis at 1 and at 3 months of age may be fundamentally different, and that feature integration by vigorous eye movements or selective attention may be the key functional difference between the age groups.     

The Development of Children's Concepts of Hardness

This study was conducted for three purposes. First, we assessed the development of children's concepts of hardness as an intensive physical quantity. We hypothesized a U-shaped behavioral growth curve for children's judgments on tasks measuring intensive physical quantity, but the hypothesis was not confirmed. The justifications accompanying correct and incorrect judgments for hardness were similar to those where U-shaped behavioral growth was found for other intensive physical quantities (temperature and sweetness). The second purpose was to determine how children solve seriation and transitivity tasks where hardness was the content. More older than younger children solved these tasks, and the transitivity task was correctly solved after the seriation task was correctly solved. One pattern of solutions for transitivity and intensive physical quantity allowed for differentiation between younger and older children who solved the intensivity tasks correctly. The third purpose was to determine whether children think that objects' hardnesses are labile (i.e., hard objects can become soft and vice versa) by simply adding more of that substance. More younger than older children thought that this was true     

The Contribution of Individualism vs. Collectivism to Cross-national Differences in Display Rules

Despite the fact that display rules are an important concept of theories of emotion and contemporary psychology, relatively little cross-cultural research has been done on them. This study examined cross-national differences in display rules of emotion, and investigated the degree to which those differences could be attributed to Individualism and Collectivism (IC) measured on the individual level. Participants in the US, Japan, South Korea, and Russia completed a comprehensive measure of display rules assessing behavioral tendencies for seven universal emotions in four social contexts in two rating domains. They also completed Matsumoto et al .'s (1997) Individualism–Collectivism Interpersonal Assessment Inventory. The results confirmed the existence of cross-national differences in IC and display rules, and indicated that IC and display rules were correlated. Significant differences between the countries remained even after IC was controlled for, and effect size analyses comparing cross-national differences when IC was controlled and not indicated that IC accounted for approximately 30% of the effect sizes related to cross-national differences. This study is unique in that it not only used the concept of IC to explain and predict differences; it also quantitatively assessed the degree to which IC contributed to those differences. These findings are discussed in terms of the utility of the IC concept to understanding cross-cultural and cross-national differences in emotion.     

Racial discrimination and psychological distress: the impact of ethnic identity and age among immigrant and United States-born Asian adults

The association between racial and ethnic discrimination and psychological distress was examined among 2,047 Asians (18 to 75 years of age) in the National Latino and Asian American Study, the first-ever nationally representative study of mental health among Asians living in the United States. Stratifying the sample by age in years (i.e., 18 to 30, 31 to 40, 41 to 50, 51 to 75) and nativity status (i.e., immigrant vs. U.S.-born), ethnic identity was tested as either a protective or exacerbating factor. Analyses showed that ethnic identity buffered the association between discrimination and mental health for U.S.-born individuals 41 to 50 years of age. For U.S.-born individuals 31 to 40 years of age and 51 to 75 years of age, ethnic identity exacerbated the negative effects of discrimination on mental health. The importance of age and immigrant status for the association between ethnic identity, discrimination, and well-being among Asians in the United States is discussed.     

Me or we? The role of personality and justice as other-centered antecedents to innovative citizenship behaviors within organizations

The present research takes an "other-centered" approach to examining personal and contextual antecedents of taking charge behavior in organizations. Largely consistent with the authors' hypotheses, regression analyses involving data collected from 2 diverse samples containing both coworkers and supervisors demonstrated that the other-centered trait, duty, was positively related to taking charge, whereas the self-centered trait, achievement striving, was negatively related to taking charge. In addition, the authors found that procedural justice at the organizational level was positively related to taking charge when evaluated by a coworker, while both procedural and distributive justice were positively related to taking charge when considered by a supervisor. Theoretical and practical implications are discussed.     

Cognitive profiles of Japanese and Canadian kindergarten and first-grade children.

Japanese kindergarten and first-grade children were given the Canadian Cognitive Abilities Test (CCAT), with slight cultural modifications. Widely used in Canadian and American schools, the CCAT consists of three batteries: verbal, quantitative, and nonverbal. The sample consisted of 454 Japanese children (234 boys, 220 girls). Results were examined by 3-month age intervals (chronological age range, 60 to 87 months of age). Subjects' scores were compared with CCAT norms, based on the performance of 3,500 Canadian children at each age level. On each battery, the Japanese children outperformed their Canadian counterparts, but the differential was most apparent on the verbal battery. Moreover, on the nonverbal battery for kindergarten Japanese children (ages 60 to 72 months), significant differences appeared only with the 60- to 63-month age cohort. Results indicate that the higher achievement of Japanese children was apparent by the time they entered kindergarten and that higher Japanese educational productivity could not be solely attributed to schooling effects. Furthermore, the data indicate that the early academic advantage of Japanese children may widen as they progress through their first year of school. (Longitudinal replication studies are suggested for examination of the long-range impact of the early cognitive advantage of Japanese children.)     

The effect of eccentricity and the adapting level on the café wall illusion

The café wall pattern is composed of rows of alternating light and dark tiles, and alternate rows are shifted by one fourth of a cycle. The rows of tiles are separated by narrow horizontal mortar lines whose luminance is between those of the dark and the light tiles. Although the mortar lines are physically parallel, they are perceived to be tilted, which is known as the café wall illusion. In this study, an energy-based model for encoding orientation is implemented in order to estimate the strength of the café wall illusion, and it is shown that the estimated orientation depends on the spatial frequency to which each orientation-encoding unit is tuned. The estimation of mortar line orientation from an orientation-encoding unit tuned to a lower spatial frequency was greater than that from a unit tuned to a higher spatial frequency. It is assumed that the perceived mortar line orientation is the result of an integration of responses from the orientation-encoding units tuned to various spatial frequencies. This leads to the prediction that under viewing conditions in which responses from orientation-encoding units tuned to a higher spatial frequency are presumably weakened, the strength of the café wall illusion increases. In agreement with this prediction, it is shown that the café wall illusion is stronger when the café wall image is presented at the periphery or is observed under low luminance levels. On the other hand, the weighted averaging of the estimated mortar orientations across spatial frequencies overestimates the perceived orientation of the mortar lines. This suggests that the final percept of the café wall illusion could be determined by some kind of nonlinear interaction, such as an inhibitory interaction, between orientation-encoding units.     

Age of first onset major depression in Chinese Americans

Using data from the Chinese American Epidemiological Study, risk for experiencing an initial episode of major depression across the life course was examined. Data were collected on 1,747 U.S.-born and foreign-born Chinese Americans (ages 18-65 years). Results suggest that Chinese American women did not evidence higher risk than Chinese American men for experiencing a 1st major depressive episode. Risk for experiencing a 1st depressive episode decreased as length of residence in the United States increased. Although those who immigrated at younger ages evidenced greater overall risk, those who came at later ages were more likely to become depressed at or soon after arrival. Competing theories of acculturation-related risk are discussed and directions for future research are proposed.     

Employee self-enhancement motives and job performance behaviors: investigating the moderating effects of employee role ambiguity and managerial perceptions of employee commitment

This study examined the effects of employee self-enhancement motives on job performance behaviors (organizational citizenship behaviors and task performance) and the value of these behaviors to them. The authors propose that employees display job performance behaviors in part to enhance their self-image, especially when their role is not clearly defined. They further argue that the effects of these behaviors on managerial reward recommendation decisions should be stronger when managers believe the employees to be more committed. The results from a sample of 84 working students indicate that role ambiguity moderated the effects of self-enhancement motives on job performance behaviors and that managerial perceptions of an employee's commitment moderated the effects of those organizational citizenship behaviors that are aimed at other individuals on managers' reward allocation decisions.