Variation in hue of a contour-contingent aftereffect due to color adaptation during inspection of the stimulus patterns

The McCollough Effect (a colored line-orientation-contingent aftereffect) has been attributed to the presence of edge detectors specific to wavelength in the human visual system. The present study tests this hypothesis by introducing unlined colored fields into the inspection condition and by comparing the subsequent aftereffect with the aftereffect induced by the inspection condition not including the unlined colored fields. The data indicate that the hues of the aftereffects differ, suggesting that the color and line stimuli may be processed by different populations of neural elements, and that the color-coded edge detector model is not adequate to account for the observations.     

Summer and school-term youth employment: ecological and longitudinal analyses.

The effects of summer versus school-year employment on self-esteem, peer relationships, and family social climate were investigated in a sample of 135 adolescents. Students were assessed the summer before entrance into high school and during the second semester of high school, using a longitudinal design. Cross-sectional findings indicated that, during the summer, 52 workers possessed higher self-esteem than 79 nonworkers. Longitudinal analysis indicated that 10 girls who worked only during the school term reported increases in both stress and activity with peers. At our final assessment, the families of 49 students who did not work at either time had become more conflicted and less cohesive than families of all other students. The developmental implications of these results are discussed.     

The relation of peer social support and psychological symptomatology during the transition to junior high school: A two-year longitudinal analysis

Studied the longitudinal relation of peer social support and psychological symptomatology among a sample of 143 early adolescents during a two-year period spanning the transition from elementary school to junior high school. Correlational analyses indicated strong inverse relations between peer support and symptoms, both cross sectionally and across time. Prospective analyses investigated the degree to which prior levels of peer support were related to subsequent symptoms after controlling for initial levels of symptoms and, conversely, the degree to which prior symptoms were related to future levels of peer support after controlling for initial levels of support. A significant prospective effect for peer support was found only for the specific period encompassing the school change. Prospective effects for symptoms were more numerous and of longer duration. The discussion emphasizes how the relation among support, stress, and mental health may differ over the course of a major life transition. Implications are also considered for the timing of preventive interventions.     

The multiple factor theory in terms of common elements

With the mechanism of common elements we designed numerous sets of variates correlated with each other in a known manner and also correlated with the primary and specific factors in the same predetermined fashion. To the correlations from theoretical populations, and also from experimental samples, Thurstone's centroid method of factoring was applied. The resulting centroid co-ordinates were rotated to yield the test vectors. These vectors were close approximations to the theoretical and sample correlations.     

A general least squares solution for successive intervals

A general least squares solution for successive intervals is presented, along with iterative procedures for obtaining stimulus scale values, discriminal dispersions, and category boundaries. Because provisions for weighting were incorporated into the derivation, the solution may be applied without loss of rigor to the typical experimental matrix of incomplete data, i.e., to a data matrix with missing entries, as well as to the rarely occurring matrix of complete data. The use of weights also permits adjustments for variations in the reliability of estimates obtained from the data. The computational steps involved in the solution are enumerated, the amount of labor required comparing favorably with other procedures. A quick, yet accurate, graphical approximation suggested by the least squares derivation is also described.This research was jointly supported in part by Princeton University, the Office of Naval Research under contract N6onr-270-20, and the National Science Foundation under grant NSF G-642, and in part by Educational Testing Service.     

Forgiveness and Suicidal Behavior: Cynicism and Psychache as Serial Mediators

Research is burgeoning regarding the beneficial association of forgiveness with numerous health-related outcomes; however, its particular relationship to suicidal behavior has received relatively little attention. Both cynicism and psychache, or agonizing psychological pain, have displayed deleterious associations with suicidal behavior, but have rarely been incorporated into more comprehensive models of suicidal behavior. Consistent with the recent development of a theoretical model regarding the forgiveness–suicidal behavior association, the present study utilized an undergraduate sample of college students (N = 312) to test a mediation-based model of the cross-sectional association of forgiveness with suicidal behavior, as serially mediated by cynicism and psychache. Dispositional forgiveness of self and forgiveness of uncontrollable situations were each indirectly associated with less suicidal behavior via less psychache. Also, dispositional forgiveness of others was indirectly associated with less suicidal behavior via less cynicism and less psychache, in a serial fashion. The present results are consistent with the extent literature on the forgiveness–suicidal behavior association, cynicism, and psychache, and pending future studies, may be utilized to inform further treatment efforts for individuals at a high risk of attempting suicide.     

Supportive adult relationships and the academic engagement of Latin American immigrant youth

The central aim of this study was to explore the academic engagement trajectories of a sample of recently arrived immigrant students from Latin America. Using an analytic framework that can dynamically model time-sensitive fluctuations (HLM; [Raudenbush, S. W., & Bryk, A. S. (2002). Hierarchicical Linear Models: Applications and Data Analysis Methods (2nd Edition ed.). Thousand Oaks, CA: Sage Publications]), we explored how initial engagement, gender, and support from caring adults at school shaped youths' engagement over time. Students reported a range of engagement trajectories, with gender and support emerging as important predictors of youths' engagement trajectories. Additionally, perceptions of support fluctuated from year to year, and these fluctuations were linked to youths' academic engagement. The findings point to associations between support perceptions and engagement, including links between students' current academic motivation and effort and their current connections with adults. Taken together, the findings present a nuanced portrait of academic engagement and suggest how relationships at school might facilitate positive academic adjustment among Latin American immigrant students over time. Implications for future research, public policy, and practice are discussed.     

Youth Functioning and Experiences in Inner-City After-School Programs Among Age, Gender, and Race Groups

Many dangers and challenges face inner-city minority children during their after-school hours. Youth development programs provide an alternative to spending this time unsupervised. We examined the relationship between children's experiences in selected urban Boys and Girls Clubs and child functioning. Because the sample (N = 296) consisted of African American and Hispanic boys and girls, aged 10–18, we were able to compare these relationships across race, gender, and age groups. There was no relationship between simple participation levels and child functioning, but significant linkages were identified between specific elements of the club experience and functioning. Relationships with club staff members and participation in club activities were associated with better functioning for older boys, a subgroup that is at considerable risk for delinquency. In addition, enjoyment of the club and not feeling badly treated there were associated with better functioning for all groups of children.