Information flows continuously in the environment. As we attempt to do something, our senses receive large volumes of information. In any conversation, messages are exchanged rapidly. To understand meaning, we have to focus, record, choose and process relevant information at every moment, before it is displaced by other information. Often,…

The relative effects of chronological age, mental age, IQ or Piagetian task performance were investigated among 143 Ss of high, average, and low IQ. Two kinds of group comparisons were made on fifteen tasks: (1) groups of the same chronological age, but different mental age and IQ, and (2) groups of the same mental age, but different chronological…

Testing, both in childhood and as adults, of 28 former pupils of special schools for the educable mentally retarded indicated that pupils who experienced most serious problems in childhood were less retarded as adults than persons who had experienced few or no problems. Results support hypothesis that the effects of early lack of environmental…

Two hundred Honolulu-area students from the fourth, fifth, eighth, and ninth grades participated in a study that examined the variables effects of five selected factors (developmental level, sex, reading ability, adult intervention, and variation in film content/form) on the ability of two age groups (nine and ten year old children and thirteen…

This report reviews a theoretically inspired empirical investigation of individual differences in knowledge, abilities, and nonability traits as part of an ongoing effort to better understand adult intellectual development and to develop more accurate measures of adult intelligence. Twenty Knowledge Scales were constructed, drawing on…