title: Development of the concept of middleness in children: response time and complexity.
abstract: 24 boys and 16 girls ages 4 through 7 years were tested on an apparatus that required children to select the middle of 3, 5, 7, or 9 stimulus lights when arranged adjacent to one another and when spaced symmetrically or asymmetrically. Analysis indicated response time decreased with age and increased as a function of the number of stimulus lights in the task. Time to respond to asymmetrical arrangements was greater than for problems whose stimuli were arranged symmetrically.
authors.affiliation: Department of Health and Physical Education, University of Missouri, Columbia 65211.
authors.forename: R H
authors.initials: RH
authors.lastname: Cox
authors.forename: K
authors.initials: K
authors.lastname: Williams
mesh_terms: D001288:Attention; D002648:Child; D002675:Child, Preschool; D003210:Concept Formation; D004193:Discrimination Learning; D005260:Female; D006801:Humans; D008297:Male; D009949:Orientation; D011597:Psychomotor Performance; D011930:Reaction Time