Two experiments studied nine-year-olds, l3-year-olds, and adults in their encoding of two kinds of stimuli taken from a psychometric measure of spatial aptitude. The first experiment used letter-like stimuli; the second employed multi-element flags. (CI)

Speed of information processing was examined in relation to fluid and crystallized intelligence in sixth graders. Reaction time parameters (except slope) were negatively correlated with scores on intelligence tasks. Partial correlations failed to support any causal relationship between fluid and crystallized intelligence in either direction.…

This is a developmental study of the effects, and role, of imagery in retrieving information from long-term memory. In two blocks of trails, first graders, fourth graders and adults determined whether or not various animals are characterized by various properties, first upon consultation of a visual image and then without imagery. (Author/SB)

A method of analyzing reaction time data in recognition memory is presented. A wide range of phenomena that any theory of recognition memory must explain is discussed. (Editor/RK)

The present study was conducted using two measures, reaction time and recognition, to assess the effects of pronounceability on encoding real words and nonwords. (Author/RK)

A study of developmental aspects of selective attention and task-related strategies of attention in 2nd and 6th graders. Age differences were found and interpreted as reflecting the development of flexible as well as selective attention strategies. (DP)

Results of the present study confirm the importance of the contingency variable in experiments dealing with the effect of supportive comment upon children's performance. (Author)

Implication of findings for classical maturation theories of the development of reaction speed are discussed. (Author/MB)

Paper sets out an attempt to use the changes in implicit associative responses resulting from semantic constraints to examine some features of the associative network aroused by the perception of a complete sentence. (Author)

Results were interpreted in terms of current conceptions of age differences in information-processing speed. (Author)

The Ss who had given more Human Movement (M) responses to an inkblot test were found to be more responsive than Ss who had given less M responses to changes in procedures and directions which altered the interest value of the task. This effect was primarily found for the female sample. (Author)