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Biomedical subjects

K Gribbin

Publications and source records attributed to K Gribbin.

4 recordsLinked to original sources
PubMed1978

Cardiovascular disease and changes in intellectual functioning from middle to old age.

The relationship between cardiovascular disease (CVD) and intellectual functioning was investigated using a categorical division of a previously studied cross-sequential sample into groups with and without clinical cardiovascular diagnoses during the period of assessment. CVD was found to be a significant predictor of performance on several cognitive subtests, even when chronological age (cohort) was included as a factor in the statistical analysis. However, the pattern of effects was not completely consistent with a model relating CVD to intellectual decrement over time. Further breakdown of subjects into CVD subgroups (e.g., hypertension) showed the CVD effect to be specific to some subgroups, but did not fully resolve the inconsistency with the decremental model. The results also suggest CVD to be one of the factors leading to subsequent attrition from the sequential sample.

Aged↗
PubMed1977

The organization of spatial abilities in older men and women.

The objective of this study was to test the cognitive identity of older male and female populations with reference to raw score, component structure, and component score measures of spatial and verbal performance. One hundred women (average age, 70.2) and 96 men (average age, 69.0) were administered three verbal and six nonverbal congnitive subtests. The equivalence of four-factor principal component analyses of the male and female correlation matrices, corrected for restriction of range, were tested with the multiple group method of factor analysis. High coefficients of congruence for the three spatial and single verbal factors argue strongly for similar congnitive structures. Multivariate analysis of the factor scores, however, showed a significant mean difference between the older men and women. But when Jöreskog's procedures are applied to test the equivalence of covariance structures, the best fit was obtained for a model involving equivalence of factor means, factor structure, factor coefficients and factor correlations.

Aged↗
PubMed1976

Monetary incentive, age, and cognition.

Results from studies of cohort differences suggest that older and younger volunteers may differ in aspects other than age. In this study subjects, who had or had not been promised $10.00 payment for their participation, were compared on certain personality and intelligence factors. No differences between incentive conditions were observed for 2466 potential subjects on willingness to participate, nor for 591 subjects eventually tested on their scores on the Primary Mental Abilities Test, the Test of Behavioral Rigidity and Cattell's 16 PF. However, differences by incentive condition were observed on the intercorrelation matrices for women on Form B of the 16 PF. Results of these analyses suggest that, with few exceptions, supplying a monetary incentive to induce subjects to participate in a study does not significantly alter the characteristics of a volunteer sample with regard to age or sex.

Adult↗