The sustained attention of 23 young adults with mild mental retardation and nonretarded subjects was assessed. Findings suggested that the sustained attention of the retarded differs from that of the nonretarded on those vigilance tasks that place demands on memory abilities. (Author/DB)

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)

The vigilance of young adults with and without mild mental retardation (MR) was compared, with subjects performing two memory demanding, cognitively based tests. The vigilance decrement of MR adults declined more rapidly than did the vigilance of non-MR adults, due to an interaction between target detectability and response bias, and poor target…

This research study evaluated the effects of memory demand on sustained attention, by varying the time interval between the presentations of stimuli in a cognitive vigilance task. Sixteen retarded and 16 nonretarded adult observers performed four 60-minute visual vigilance tasks in which single digits were presented sequentially and successively…