In a second experiment the light change task was changed to a singleton search (detect the onset of a yellow light) and the workload of the car following task was systematically varied.
Over time, the difficulty and complexity of each task are systematically increased as users attain specified performance criteria.
They suspected that subjects' preparation to the task was systematically worse in change blindness trials than in trials in which participants correctly reported the absence of change.
The finding here that performance in the location recognition task was systematically related to DA levels in NAc shell is consistent with an emerging literature implicating plasticity within the NAc in the processing of spatial information (e.g., Annett et al., 1989; Seamans & Phillips, 1994).
Additionally, data about adherence, relapses, and achievement of intersession tasks is systematically collected during every treatment session.
Importantly, using this paradigm, subjects perform identical wrist movements across all conditions, such that the output of the investigated muscles can be kept constant while task complexity is systematically varied.
For a parallel (or "pop-out") task, the first chosen location is systematically the target, but for a serial (or "difficult") task, the system may cycle on a few distractors before finally focusing on the target.
For example, Lakatos et al. (2008) reported that the reaction time in visual or auditory oddball tasks performed by monkeys is systematically modulated by the phase of delta band oscillations of CSD signals at the timing of stimulus onset.
In psychophysical task conditions where stimulus information is systematically varied, we should observe effects of stimulus information on the length of the coherence interval.
When two tasks are presented within a short interval, a delay in the execution of the second task has been systematically observed.
