Differences on six Horn abilities for 14 age groups between 15-16 and 75-94 years

Article Abstract:

Horn abilities appear differently in different age groups. The results of a study on individuals aged 15-94 years support the classification of crystallized and quantitative abilities as maintained abilities, and fluid and broad visualization abilities as vulnerable abilities. The 40-44 year age group exhibits peak performance on crystallized abilities. However, this peak is lower than the peak of the 55-64 year age group on the Wechsler Adult Intelligence Test - Revised Verbal IQ. The results show that short-term acquisition and retrieval are maintained abilities.

Reports, Testing, Age groups, Ability, Aptitude tests, Age and intelligence

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The fluid and crystallized abilities of White, Black, and Hispanic adolescents and adults, both with and without an education covariate

Article Abstract:

The examination of race/ethnic variation on the Horn-Cattel fluid and crystallized constructs reveals that there is a remarkable relationship between race/ethnic groups and performance on fluids and crystallized variables. Blacks and Hispanics are overwhelmed by Whites with regards to tasks dependent on school learning (crystallized), and on those which show new problem solving (fluid). Covariation in educational attainments do not affect the results. Hispanics do better on fluid.

Psychological aspects, Demographic aspects, Teenagers, Youth, Cognition, Intellect, Intelligence levels

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Development and validation of a Rasch-Derived CES-D short form

Article Abstract:

A Rasch-derived short form of the center for Epidemiologic Studies Depression scale (CES-D) is presented for use as a depression-screening tool in the general population. The findings challenge depression researchers and theorists to reconsider the interfactor relationships in the study and assessment of depression.

United States, Science & research, Depression, Mental, Depression (Mood disorder), Epidemiologic methods

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