Eight-year-old children were trained on length or weight relationships between adjacent members of a five-item series of colored objects. Visual feedback was provided. Results indicated more salient visual feedback reduced learning effort for length but not for weight comparisons. Encoding differences found in another experiment were used to…

Subjects from kindergarten-age to adult participated in four experiments. In order to view the stimuli, subjects in three experiments activated lights in viewing boxes; in the fourth experiment, stimulus fixations were measured using a corneal reflection technique. Results supported the view that visual observing is controlled by cognitive…