We evaluated the statistical power of single-indicator latent growth curve models (LGCMs) to detect correlated change between two variables (covariance of slopes) as a function of sample size, number of longitudinal measurement occasions, and reliability (measurement error variance). Power approximations following the method of Satorra and Saris…

Participants (230 White college students) completed the Psychosocial Costs of Racism to Whites (PCRW) Scale. Using cluster analysis, we identified 5 distinct cluster groups on the basis of PCRW subscale scores: the unempathic and unaware cluster contained the lowest empathy scores; the insensitive and afraid cluster consisted of low empathy and…

This study examined psychometric properties of the Spanish translation of the Marital Satisfaction InventoryRevised (MSI-R) in a sample of 71 Spanish-speaking couples in Mexico. Results from this sample were compared to findings obtained from 65 Mexican American couples who completed the MSI-R in Spanish. Both the internal consistency and factor…

The dependence construct fills an important explanatory role in motivational accounts of smoking and relapse. Frequently used measures of dependence are either atheoretical or grounded in a unidimensional model of physical dependence. This research creates a multidimensional measure of dependence that is based on theoretically grounded motives for…

Children of parents with mental illness are an at-risk population according to research on psychiatric outcomes using White, middle-class samples of depressed parents and infants and preschool children. The current study expands this evidence by exploring within-group heterogeneity across psychosocial outcomes, in a racially diverse, low-income…

The conventional way to measure program impacts is to compute the average treatment effect; that is, the difference between a treatment group that received some intervention and a control group that did not. Recently, scholars have recognized that looking only at the average treatment effect may obscure impacts that accrue to subgroups. In an…

Maritime services form an integral part of what regulatory agencies requires for the safe navigation and operation of vessels. Therefore, the maritime industry's compliance with governmental regulations and international protocols has been essential for maritime safety management. As a basis to this aspect, the preparation of maritime students as…

This study was designed to establish and validate a multidimensional empirically based typology of clinically referred adolescent substance abusers. A total of 141 adolescent substance abusers, most of whom were male, African-American, and juvenile justice involved, comprised the study sample. Youth and their parents completed comprehensive…

Drawing upon self-categorization theory, we predicted that the content of children's stereotypes concerning the gender in-group would be contextually variable. Two studies are reported, each looking at five-, seven-, and 10-year-old children's stereotypes of the gender in-group in two different contexts. Study 1 examined judgements of the…

This study examined children's reading performance and its developmental trajectories during the first and the second grade. Ninety children were tested five times on word reading and reading comprehension. Qualitatively different groups were identified through cluster analysis: Competent, Technical, and Poor Readers. The results showed that the…

Nine children with severe-profound prelingual hearing loss and single-word reading scores not more than 10 months behind chronological age (Good Readers) were matched with 9 children whose reading lag was at least 15 months (Poor Readers). Good Readers had significantly higher spelling and reading comprehension scores. They produced significantly…

The hypothesis that an economic recession in society leads to class equalisation in the recruitment of new students to higher education is tested, using data from Sweden. The 1990s is a period suitable for these analyses, as the recession started in 1991, reached the highest unemployment level in 1993; finally, at the end of the decade the labour…

Despite ongoing concern about substance use during adolescence, very little is known about alcohol and drug use among teens living in affluent social settings. In this longitudinal study, cluster analysis was used to characterize patterns of substance use and change in other dimensions of psychosocial adjustment within a cohort of 292 high school…

In separate studies, observers viewed upright biological motion, inverted biological motion, or arbitrary motion created from systematically randomizing the positions of point-light dots. Results showed that observers (a) could learn to detect the presence of arbitrary motion, (b) could not learn to discriminate the coherence of arbitrary motion,…

Hierarchical agglomerative cluster analysis (HACA) may yield different solutions under permutations of the input order of the data. This instability is caused by ties, either in the initial proximity matrix or arising during agglomeration. The authors recommend to repeat the analysis on a large number of random permutations of the rows and columns…