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Download full textPezzullo, Thomas R.; And Others – 1972
Heritability is defined as the proportion of a manifested trait's varience that is due to genetic variation. Sixty-five pairs of twins were employed to investigate the heritability of: (1) short term memory (Jensen's Level 1), operationalized using of modified "digit span" test; (2) the general intellective factor (Jensen's Level II),…
Descriptors: Academic Ability, Compensatory Education, Genetics, Heredity
Pezzullo, Thomas R.; Madaus, George F. – 1971
A study of twins was conducted to determine the presence of an hereditary component in short term memory and in three aspects of verbal divergent thinking--flexibility, fluency, and originality. Results showed the existence of a significant genetic component in the trait of short term memory, while none was found in verbal divergent thinking. (AG)
Descriptors: Biological Influences, Cognitive Processes, Creative Thinking, Divergent Thinking
