Electrophysiological changes of N100 latency and amplitude in healthy participants performing the Jitter Orientated Visual Integration task: a multi-block design study

The present study investigated the differences in processing during visual integration in healthy adults. The visual N100 indexes early visual discrimination and in this case, was hypothesized to show differences in both latency and amplitude depending on the level of difficulty which corresponds to orientational jitter in a visual integration task. Four blocks with pseudo-random levels of jitter were presented to participants in the Jitter Oriented Visual Integration (JOVI) task. Results looking at the Oz channel showed significant reduction in amplitude in the visual N100 during the more difficult levels condition of the task. The multi-block design, originally expected to show practice effects only exhibited an interaction effect with the easy levels in Event Related Potential (ERP) latency