Abstract
Event-related potential studies using delayed match-to-sample tasks have demonstrated the presence of two components, N270 and N400, possibly reflecting the sequential processing of multiple sources of endogenous mismatch. To date, studies have only investigated mismatch between a single cue and target. In this study, we used distractor stimuli to investigate the effect of a secondary source of mismatch distinct from the task-relevant stimulus. Subjects performed two paradigms in which the cue and target could match or mismatch. In one paradigm, task-irrelevant distractors were added--producing a source of task-irrelevant perceptual mismatch. A mismatch-triggered negativity was elicited in both paradigms, but was delayed and enhanced in magnitude in the distractors present paradigm. It is suggested that the distractors may differentially affect mismatch responses through the generation of a task-irrelevant mismatch response.
| Original language | English |
|---|---|
| Pages (from-to) | 456-63 |
| Number of pages | 8 |
| Journal | PSYCHOPHYSIOLOGY |
| Volume | 51 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - May 2014 |
Keywords
- Adolescent
- Adult
- Conflict (Psychology)
- Cues
- Evoked Potentials
- Female
- Humans
- Male
- Photic Stimulation
- Psychomotor Performance
- Visual Perception
- Young Adult
Profiles
-
Giorgio Fuggetta
- School of Psychology - Senior Lecturer
- Centre for REsearch in Psychological Wellbeing
Person: Academic