A Study of Speed Factors in Tests and Academic Grades

Frederic M. Lord

74 citations0/0 files storedPsychometrika

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Psychometric Methodologies and Testing Education, Achievement, and Giftedness Cognitive Abilities and Testing

Abstract

Speeded and unspeeded tests of vocabulary, spatial relations, and arithmetic reasoning were factorially analyzed, together with certain reference tests and academic grades. Lawley's maximum likelihood method was used, the computations being carried out on the Whirlwind electronic computer. Four different speed factors were isolated, together with a second-order general speed factor. Consistent small positive correlations between the academic grades and the speed factors were found.

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1950TESTS OF SIGNIFICANCE IN FACTOR ANALYSIS 1950The Structure of Human Abilities.1939THE FACTORIAL ANALYSIS OF HUMAN ABILITY 1940VI.—The Estimation of Factor Loadings by the Method of Maximum Likelihood 1955Estimation and Tests of Significance in Factor Analysis 1951The Structure of Human Abilities 1951A FURTHER NOTE ON TESTS OF SIGNIFICANCE IN FACTOR ANALYSIS 1951The description of aptitude and achievement tests in terms of rotated factors.

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1958To What Extent can Communalities Reduce Rank?1996The speed-accuracy transition due to task complexity 1957A Significance Test for the Hypothesis that Two Variables Measure the Same Trait Except for Errors of Measurement 1975Determining the number of interpretable factors.1985On Testing Functional Constraints in Structural Equation Models 2011Modeling Individual Differences in Numerical Reasoning Speed as a Random Effect of Response Time Limits

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