Task specific attending behavior of a mentally retarded adult engaged in a chain-cutting task was substantially increased by using a differential reinforcement procedure with a feedback stimulus for appropriate visual orientation. (Author/DLS)

Outlines a method by which observation time as measured by visual fixation on an object in the visual field can be predicted for N items viewed simultaneously in the field when the time for observing each item presented singly is known. (Author/MG)

This study aimed to extend earlier work (Wilding, Munir, & Cornish, 2001; Wilding, 2003) which showed that children (aged 6-15) who were rated by their teachers as having poor attentional ability made more errors on a visual search task than children rated as having good attentional ability. The present study used a simpler version of the search…

Habituation and dishabituation to a simple geometric stimulus were examined for a sample of 36 5-month old subjects. All subjects viewed successive presentations of a standard stimulus, and, following a retention interval, a single presentation of the standard and a novel stimulus in the test phase. During the interpolated interval, repeated…

Attempts to improve methods employed by Uzgiris and Hunt. The longitudinal schedule of events in this experiment involved 24 infants one month old in an experimental group whose mothers were instructed to present and change a visual stimulus pattern. (WY)

Based on an M.A. degree submitted to McMaster University, England.

The effects of a visual distractor on vigilance task performance were examined in a sample of 35 learning disabled and 35 normal boys 8-12 years old. (Author/DB)

The spans of apprehension (the amount of information processed simultaneously from a brief visual display) of 19 hyperactive and 19 normal boys (6-10 years old) were compared with a forced-choice letter-recognition task developed by W. Estes. (Author/CL)

Mentally retarded and nonretarded adults (n=32) performed visual vigilance tests in which single digits were presented at either a fast or slow rate and the rate shifted without warning. Retarded observers detected fewer targets and made more false alarms than did nonretarded observers in all test conditions. (Author/JDD)

Second grade children, divided into high and low achievement groups, were tested on a visual vigilance task in which stimuli occurred 24 times in 30 minutes. High achievers responded correctly more often. (ST)