Abstract
Previous confirmatory factor analysis has supported a distinction between simple and complex motor skill tests in a modified and expanded Halstead Reitan test battery (HRB). The present study used a sample of 722 right-handed boys and girls, aged 9 through 12, and expanded the sample of motor, psychomotor, and visual-spatial tests to further clarify this distinction. Restricted maximum-likelihood factor analysis resulted in correlated factors of Simple Motor Skill, Complex Visual-Spatial Relations, Simple Spatial Motor Operations, Motor Steadiness, and Speeded Motor Sequencing. These results provide additional evidence for the discriminant validity of this particular battery of tests, and explicate further the skills and abilities measured in neuropsychological assessments of children referred for evaluation.
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