The Effect of Increased Monitoring Load on Vigilance Performance Using a Simulated Radar Display

The effect of visual taskload on critical flicker frequency (CFF) change during performance of a complex monitoring task

“…In the present study, none of the subjective measures of fatigue that were employed showed any differences, either qualitative or quantitative, as a function of taskload. A -similar lack of relationship of subjective fatigue to taskload was also found in our earlier study (Thackray et al 1979). While one might speculate almost .…”

“…final 4 hours. On the basis of those findings, it is conceivable that the lack ' of relationship of subjective fatigue to taskload that was found in both the present study and in our earlier one (Thackray et al 1979) as well, may have been due to the duration of the monitoring sessions employed. Had sessions 15 2" :,.…”

“…If we compare the findings of this study with those of our earlier one in which * we compared monitoring performance to 4, 8, and 16 targets (Thackray et al 1979), a number of similarities become apparent. Both studies found evidence of performance decline occurring over a 2-hour session of continuous monitoring, but only under the highest taskload condition.…”

“…In a previous study, we examined the effect that differing levels of Visual taskload might have on the ability to sustain attention to a rather passive ATC monitoring task (Thackray et al 1979). In this study, subjects were required to monitor either 4, 8, or 16 targets in order to detect occasional o 1 tii " l changes in the alphanumerics.…”

A comparison of the vigilance performance of men and women using a simulated radar task

“…As with the previous study in which this task was used (14), errors of omission , commission , and procedure were almost nonexistent. Three critical 30-MINUTE PERIODS Figure 3.…”