Good Vibrations: Modality Influences on Reactive Inhibition in the Stop-Signal Paradigm
Wed-A7-Talk VII-01
Presented by: Maximilian Friehs
Stopping an already initiated response is vital for adaptive everyday behavior. For example, every athlete knows the feeling that a just initiated action is wrong or leads to a disadvantage. A table tennis player might notice – while actually returning a serve – that the serve went out wide. In the laboratory, the ability to inhibit already initiated responses can be measured using tasks such as the Stop-Signal Task (SST), which typically requires reaction to a visual go-signal and the subsequent stopping of a reaction on a small subset of trials. What remains unclear is whether or not the modality of the stop-signal has any influence of the performance. We hypothesized that the tactile stop-signal condition would have a performance advantage in an otherwise visual task. In multiple experiments we evaluate the effects of a cross-modal stop-signal and the results show a significant performance advantage of tactile stop-signals as compared to visual ones in an otherwise purely visual task. Further, we investigate the potential over-additive effect of stop-signals that cover multiple modalities. Yet, the influence of modality on SST performance in complex environments remains even less clear and it could be assumed that distracting stimuli only affect stopping performance if they are presented in the same modality as the stop-and go-signal. But if distractors are only presented in the modality of the go-signal it might have no effect at all or only effect the go-reactions.
Keywords: Inhibition, Stop-Signal Task, Cross-Modal, Multisensory, Cognitive Control