Examines Kail's argument that similarity in developmental speed-of-processing curves for name retrieval and mental rotation indicates that performance on a wide range of cognitive tasks is constrained by growth of a central limiting mechanism. Results suggest that operation of this mechanism is neither sufficient nor necessary to generate the…

A model of information processing has been developed that combines concepts from the study of attention and the study of problem solving. The model has been realized as a computer program and used to simulate a variety of phenomena from the attention and performance literature. (Author/LMO)

Assesses performance of 9-, 13-, and 20-year-olds on 3,840 trials of a mental rotation task in which subjects judged if pairs of stimuli presented in different orientations were identical or mirror images. Results are discussed in terms of possible mechanisms underlying the impact of practice. (Author/NH)

Children's mental performance was studied in the context of arithmetic word problem solution. Response latency and error data indicated subtraction was more difficult than addition. Understanding children's problem solutions in terms of flexible strategy use and the fact that many errors have a systematic basis are important in studying children's…

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)

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)

Research supported by United States Public Health Service Grant MH-12908. Portions of the study were presented to the Society for Psychophysiological Research, San Diego, 1967.

Subjects judged whether aerial views would be seen by an observer oriented in various ways. For practiced subjects, time to answer was an approximately linear function of number of abstract spatial dimensions on which aerial view and observer's orientation were consistent. Ability correlated with linearity of response-time. (Author/RD)

Mildly retarded young adults were given simple and choice reaction time (RT) tests. Subjects' RTs increased with stimulus complexity. RTs of retarded subjects were slower and evidenced more intraindividual variability than those of nonretarded subjects. Several RT parameters were related to measures of intelligence. (Author/RD)

An information-processing analysis of intelligence proposed by Eysenck and Furneaux was examined in an experimental study of semantic categorization and free recall by 11-year-old children of varying intelligence. Results, and implications of the results, are discussed. (Author/KC)

Apparently contradictory findings regarding the locus of information processing differences between retarded and nonretarded persons were discussed. (Author)

Two experiments found that integration of facts alleviates interference only when a person can perform a memory task by making a consistency judgment and can avoid the need to retrieve a specific fact. People judge themes rather than facts: the more themes associated with a concept, the greater the interference. (Author/RD)

The semantic memory search process was examined in second graders (N=30) under an induced imagery and a control condition. (MP)