Figure 4. Comparison of variable and fixed foreperiods.
Mean latency (±2 SE) as a function of delay duration in target trials. Variable foreperiod (Variable) and fixed foreperiod blocks of trials (Fixed). In the variable foreperiod condition, mean latencies were longer for 400 ms delay duration. An opposite trend was found in the fixed foreperiod condition. Group data from 6 subjects (6/9) who participated in this control experiment.