Matching familiar figures test: a unidimensional measure of reflection-impulsivity?

In an initial factor-analytic study using preschool children (41 girls, 44 boys), the errors and latencies on the Matching Familiar Figures Test saturated different factors. A second study (47 boys, 39 girls), employing the Kansas Reflection Impulsivity Scale for Preschoolers, replicated this finding. In addition, the error (but not the latency) was associated with measures of gross-motor, fine-motor, and perceptual-motor coordination. The results suggest that error measures a maturational dimension of task-oriented attention for this age group.