William Meredith

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BACKGROUND Analysis of subgroups such as different ethnic, language, or education groups selected from among a parent population is common in health disparities research. One goal of such analyses is to examine measurement equivalence, which includes both qualitative review of the meaning of items as well as quantitative examination of different levels of(More)
Newlywed spouses (N = 215 couples) were tested on 21 tests of specific cognitive abilities and responded to a questionnaire on their educational and socioeconomic (SES) background. A comparison of the present spouse correlations with those of long-standing marriages suggests that spouses resemble each other in abilities from the start and that the degree of(More)
The extent of loneliness among midwestern adolescents was investigated in relation to depression, self-esteem, family strengths, parent-adolescent communication, age, and gender. The study sample consisted of 156 adolescents, ranging in age from 11 to 18 years, who were attending public schools in four midwestern communities. It was found that the subjects(More)
Six aspects of personality were examined for a sample of 211 individuals across either a 30- or 40-year time span. Latent curve analyses found an underlying pattern of lifetime change for self-confidence, cognitive commitment, outgoingness, and dependability. An underlying pattern of lifetime stability was found for assertiveness. No shared systematic(More)
The authors use multiple-sample longitudinal data from different test batteries to examine propositions about changes in constructs over the life span. The data come from 3 classic studies on intellectual abilities in which, in combination, 441 persons were repeatedly measured as many as 16 times over 70 years. They measured cognitive constructs of(More)
We examined how family strengths, parent-adolescent communication, self-esteem, loneliness, age, and gender interrelate, and how this interaction influences depression in adolescents. The data were collected on a written questionnaire completed by 156 adolescents who were attending public schools in four communities in the midwestern United States. We(More)
This study examined longitudinal health and intelligence data to determine whether sensory or motor deficits account for some of the age-related intellectual changes that are commonly seen from midlife onward. Although sensory and motor functioning did not account for the age-related decrements in performance on speeded, visual perceptual tasks found for(More)
Developmental paths of psychological health were examined for 236 participants of the Berkeley Growth Study, the Berkeley Guidance Study, and the Oakland Growth Study. A clinician-reported aggregate index, the Psychological Health Index (PHI), based on California Q-Sort ratings, was created for subsets of participants at 14, 18, 30, 40, 50, and 62 years of(More)