title: Factors related to speed of assembling blocks without boundary frames after trials with the frames.
abstract: Three frames that enclose equal areas for a rectangle, a Greek cross, and an isosceles triangle were used to study how 122 subjects learned to fill the frames rapidly with five blocks for five trials, and then the effect of requiring the shapes to be assembled for five more trials without the frames. Assembling all three shapes during each trial caused interference. Many instances occurred of a shape taking longer to be assembled on trial 6 than on trial 1. During the last five trials, the appropriate frame was provided whenever 3 minutes elapsed. Subjects with no 3-minute failures had a higher IQ than the others. Men's assembly time correlated with scores on a visual closure test; proficient men benefited in the frameless situation from their closure skill.
authors.affiliation: National Institute of Neurological Disorders & Stroke, NIH, Bethesda, MD 20892.
authors.forename: H
authors.initials: H
authors.lastname: Lansdell
mesh_terms: D000328:Adult; D001288:Attention; D001925:Brain Damage, Chronic / Q000175:diagnosis* / Q000523:psychology; D005260:Female; D006801:Humans; D008297:Male; D009483:Neuropsychological Tests; D009949:Orientation; D011340:Problem Solving; D011597:Psychomotor Performance; D011930:Reaction Time; D014888:Wechsler Scales