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Gepubliceerd in: Psychological Research 8/2019

17-05-2018 | Original Article

Cross-modal decoupling in temporal attention between audition and touch

Auteurs: Stefanie Mühlberg, Salvador Soto-Faraco

Gepubliceerd in: Psychological Research | Uitgave 8/2019

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Abstract

Temporal orienting leads to well-documented behavioural benefits for sensory events occurring at the anticipated moment. However, the consequences of temporal orienting in cross-modal contexts are still unclear. On the one hand, some studies using audio-tactile paradigms suggest that attentional orienting in time and modality are a closely coupled system, in which temporal orienting dominates modality orienting, similar to what happens in cross-modal spatial attention. On the other hand, recent findings using a visuo-tactile paradigm suggest that attentional orienting in time can unfold independently in each modality, leading to cross-modal decoupling. In the present study, we investigated if cross-modal decoupling in time can be extrapolated to audio-tactile contexts. If so, decoupling might represent a general property of cross-modal attention in time. To this end, we used a speeded discrimination task in which we manipulated the probability of target presentation in time and modality. In each trial, a manipulation of time-based expectancy was used to guide participants’ attention to task-relevant events, either tactile or auditory, at different points in time. In two experiments, we found that participants generally showed enhanced behavioural performance at the most likely onset time of each modality and no evidence for coupling. This pattern supports the hypothesis that cross-modal decoupling could be a general phenomenon in temporal orienting.
Voetnoten
1
In addition to mean reaction times and accuracy, we analysed the obtained median reaction times and inverse efficiency. However, since the results for the median and mean reaction times were in accordance to each other, and since no trade-offs between reaction times and accuracy could be found, we decided to only report the mean reaction times, since they have also been previously reported in Mühlberg et al. (2014), as well as in Lange and Röder (2006).
 
2
In other words, like we have a high spatial resolution for vision and therefore visual dominance in cross-modal spatial paradigms (e.g. ventriloquist effect; Jackson, 1953; Slutsky & Recanzone, 2001; Spence, 2010; Welch & Warren, 1980), the resolution for audition in the temporal domain is higher than for vision or touch (Bresciani et al., 2005; Fendrich & Corballis, 2001; Morein-Zamir et al., 2003) and therefore audition would lead in temporal attention paradigms, dominating over all possible modulations in other modalities.
 
3
Responses towards expected stimuli elicit a weaker N100 component than the unexpected stimuli (Lange, 2009) and reduced fMRI activity (Kok et al., 2012). This reduced activity is thereby caused through a suppression of the activity of neurons encoding for unexpected events, leading to a sharpening of neural activity (Kok et al., 2012).
 
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Metagegevens
Titel
Cross-modal decoupling in temporal attention between audition and touch
Auteurs
Stefanie Mühlberg
Salvador Soto-Faraco
Publicatiedatum
17-05-2018
Uitgeverij
Springer Berlin Heidelberg
Gepubliceerd in
Psychological Research / Uitgave 8/2019
Print ISSN: 0340-0727
Elektronisch ISSN: 1430-2772
DOI
https://doi.org/10.1007/s00426-018-1023-6

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