Examined five possible rules that children might use to interpret the terms "big" and "little." Increasing consistency in rule usage appeared to be the most significant developmental progression for children between the ages of three and five with respect to these terms. (Author/RH)

Evaluated the effects of stimulus complexity and rule usage on a visual perspective-taking task administered to preschoolers, first, third, and fifth graders, and adults. Errors decreased with age, and more errors occurred with the more complex visual arrays. Very young children could not reliably match a photograph to a physical array. (Author/RH)

Preschool, second-, and sixth-grade children performed developmentally gradated, easy and difficult visual discrimination tasks in a quiet room or with one of two levels of extraneous auditory stimulation. Subjects' errors, response latencies, and glances away from the task were recorded. (Author/RH)

Focuses on differences occurring with age and reading skill in the use of phonemic codes in short-term retention tasks where stimuli were presented visually. Subjects were groups of average readers in grades two, four, and six; superior readers in grade four; and disabled readers in grades four and six from three public schools. (Author/RH)

In recent research, two qualitatively different classes of mental operations have been identified. The performance of one type of cognitive task requires attention, in the sense of mental effort, for its execution, while the second type can be performed automatically, independent of attentional control. Further research has shown that automatic…