Rh. Cox et K. Williams, DEVELOPMENT OF THE CONCEPT OF MIDDLENESS IN CHILDREN - RESPONSE-TIME AND COMPLEXITY, Perceptual and motor skills, 77(3), 1993, pp. 1275-1281
24 boys and 16 girls ages 4 through 7 years were tested on an apparatu
s that required children to select the middle of 3, 5, 7, or 9 stimulu
s lights when arranged adjacent to one another and when spaced symmetr
ically or asymmetrically. Analysis indicated response time decreased w
ith age and increased as a function of the number of stimulus lights i
n the task. Time to respond to asymmetrical arrangements was greater t
han for problems whose stimuli were arranged symmetrically.