The upper spatial limit for perception of displacement is affected by preceding motion.

The upper spatial limit D(max) for perception of apparent motion of a random dot pattern may be strongly affected by another, collinear, motion that precedes it [Mateeff, S., Stefanova, M., &.

Flanker interference in young and older participants as reflected in event-related potentials.

The present study investigates behavioural and event-related potential (ERP) differences between young and older participants in two variants of a flanker task. Flankers preceded the target by 100 ms (Experiment 1) or were presented simultaneously with the target (Experiment 2). In both experiments the response times showed an age-related slowing and a compatibility effect, which did not differ significantly across age.

Error processing in patients with Parkinson's disease: the influence of medication state.

One of the hallmarks of Parkinson's disease (PD) is a depletion of dopamine. Error processing, as reflected in a component of the event-related potential, the so-called error (related) negativity (Ne or ERN) is likely dependent on the midbrain dopaminergic system. In case of an unfavourable event such as an error, this system is assumed to send an error signal to the mediofrontal cortex, which elicits the Ne.

Perceived global direction of a compound of real and apparent motion.

We presented a random dot pattern that moved horizontally for 1.6s within a stationary invisible aperture. The dots were periodically visible for 50 ms (visible phase) with lengths of the real motion 0-1.

Effects of ageing on cognitive task preparation as reflected by event-related potentials.

Objective: The anticipation of complex cognitive tasks involves effortful preparation being reflected in the contingent negative variation (CNV) of the event-related potential. In the literature there are contradictory results concerning the effect of age on this potential. We wanted to investigate effects of age, time-on-task, and task difficulty on the CNV.