The game of "Simon Says" was played individually with preschool and elementary school students. Errors decreased significantly with grade. (ST)

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)

Results reaffirm the notion that retarded individuals are less adept at recognizing familiar forms haptically than visually. (Author)

Tested the hypothesis that young children's tendency to draw horizontal or vertical objects perpendicularly to an oblique surface reflects their preference for perpendicular drawings as conceptually correct depictions. (Author/RH)

Presents a stochastic model for distinguishing mental arithmetic errors according to causes of failure. A series of experiments (1) studied questions of goodness of fit and model validity among four and five year olds and (2) used the model to measure the relative contributions of developmental improvements in short-term memory and arithmetical…