An optimal unbiased classification rule is proposed based on a longitudinal model for the measurement of change in ability. In general, the rule predicts future level of knowledge by using information about level of knowledge at entrance, its rate of growth, and the amount of within-individual variation. (SLD)

Finds support for eight theoretically derived hypotheses concerning how highly misanthropic individuals respond differently to influence attempts, and concerning the positive relationship between misanthropy and the avoidance of health care. Shows that respondents high in misanthropy report higher actual incidence of stress-related diseases. (SR)

Infants at two, four, and six months of age learned a string-pulling task and were tested again two months later. Individual differences in emotional expressions of anger during extinction, and interest and enjoyment during learning, were stable over the two-month interval. (BC)

Individual differences in industriousness are discussed. It is proposed that reinforcement for increased physical or cognitive performance, or the tolerance of aversive stimulation, gives a reward value to the sensation of high effort and reduces effort's aversiveness. Applications for self-control, moral development, and education are described.…

At a Suburban New Jersey elementary school, the principal learned to let go and provide the means for staff to solve their own problems. Some lessons include learning to listen, establishing patterns of communication, understanding individual styles, promoting open communication, working to build trust, thinking with new perspectives, promoting…

The relationship between elementary operations underlying processing of numerical information and performance on psychometrically derived ability measures requiring processing of numbers but defining separate ability factors was studied for 102 Air Force recruits (54 males and 48 females). Patterns of convergent and discriminate relationships for…

Examined developmental changes and individual variations in the ways children use expressive information from others. Concluded that processing deficits are more probable for younger children or for children with low perceived control than for other children. (BB)

Examines information-processing differences among four types of readers differing in reading comprehension and speed. Finds that good comprehenders outperformed poor comprehenders on all types of tasks, but the results were less clear for the high- and low-speed readers. Proposes differences in working memory as a source of individual differences…

In 2 studies, subjects between 7 and 16 years of age indicated predictions for the water level in a tilted container or the position of a plumb line. Found that sex differences were evident at all ages; task performance improved with age according to a discrete stage process; and task performance was determined by field effects and rule strategy.…

Observed play behaviors in 21 African American preschool children from impoverished families in Head Start classrooms. Play behaviors were categorized as functional, constructive, or pretend. Found that children engaged most frequently in functional play, although many also engaged in pretend play, suggesting that impoverished black children have…

Examined violent and nonviolent inner-city children's moral reasoning about violence in family and peer situations. All of the children condemned unprovoked violence. With provoked situations, the violent group focused more on the immorality of the provocation and perceived force akin to reciprocal justice, whereas the nonviolent group perceived…

Because they used an inappropriate statistical procedure, J. H. Kranzler and A. R. Jensen (1991) have not demonstrated that a factor of general intelligence ("g") depends on several independent factors. A factorial reanalysis of their data suggests that speed and efficiency of information processing are important in "g." (SLD)

The hypothetical idea of a perfectly pure psychometric "g" is empirically unattainable. Because the unity of "g" cannot be proved or disproved by factor analysis, the unitary "g" hypothesis represents a parsimonious assumption. J. B. Carroll's (1991) analysis demonstrates the relationship between psychometric and…

A study of employed undergraduate management students was conducted to determine whether responses on computerized surveys are more candid than those on paper-and-pencil scales. Subjects were given either a paper-and-pencil or a computer version of the Job Descriptive Index (JDI) and the Self-Monitoring Scale to measure job satisfaction. (43…

Children in grades three through five and adults performed a number-matching task. Found that changes in the strength of arithmetic connections occurred with development and accounted for individual differences among adults. Individual differences among children were related to changes in the strength of number-line connections. (Author/GLR)