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University of St. Andrews

1. Innes, Bobby Richard. Targeting benefits and interactions in multisensory processing : a novel modelling framework for exploring the redundant signal effect .

Degree: 2019, University of St. Andrews

An overarching goal of multisensory research is to understand the rules by which multiple sensory signals are combined to produce behavioural benefits. One example of a multisensory benefit is that response times (RTs) to multisensory signals are faster than RTs to either component unisensory signal (the redundant signal effect). In contrast to other areas of multisensory research, a common explanatory model framework (and thus the basic combination rule) has yet to emerge for multisensory RT benefits. One key reason for this lack of progress would seem to be that additional processing interactions are infrequently quantified, and are rarely incorporated into a formal model of RTs. In this thesis, I assess the ability of a previously-neglected model class – so called race models – to account for both benefits and interactions. To do so, I develop and apply a comparative approach to RT analysis. This approach tests different experimental factors which attempt target sources of benefits and interactions. The effect of these manipulations is compared across 3 key analytical steps. First, the size of the multisensory benefit (i.e. the redundant signal effect) is computed, and compared to the basic prediction of the race model combination rule. Second, indicators of processing interactions beyond the basic combination rule are quantified. Third, a formal race model is applied to explain benefits and processing interactions. By consistently applying this comparative approach, I demonstrate that the race model framework offers a simple yet powerful account of multisensory benefits across participants. This suggests a basic combination rule for multisensory RT benefits. In addition, a new interpretation of interactions emerges by applying a race model framework, which highlights an important role of context. This approach suggests a common foundation for future studies of multisensory RTs, which can implement the same analytical steps within a wide range of experimental contexts. Advisors/Committee Members: Otto, Thomas (advisor).

Subjects/Keywords: Reaction times; Multimodal integration; Perceptual decision-making; Probability summation; Redundancy gain; Context independence; Logic gates; Serial dependence; Miller's inequality; Interactive race model; Coactivation model

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Innes, B. R. (2019). Targeting benefits and interactions in multisensory processing : a novel modelling framework for exploring the redundant signal effect . (Thesis). University of St. Andrews. Retrieved from http://hdl.handle.net/10023/17968

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Innes, Bobby Richard. “Targeting benefits and interactions in multisensory processing : a novel modelling framework for exploring the redundant signal effect .” 2019. Thesis, University of St. Andrews. Accessed July 20, 2019. http://hdl.handle.net/10023/17968.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Innes, Bobby Richard. “Targeting benefits and interactions in multisensory processing : a novel modelling framework for exploring the redundant signal effect .” 2019. Web. 20 Jul 2019.

Vancouver:

Innes BR. Targeting benefits and interactions in multisensory processing : a novel modelling framework for exploring the redundant signal effect . [Internet] [Thesis]. University of St. Andrews; 2019. [cited 2019 Jul 20]. Available from: http://hdl.handle.net/10023/17968.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Innes BR. Targeting benefits and interactions in multisensory processing : a novel modelling framework for exploring the redundant signal effect . [Thesis]. University of St. Andrews; 2019. Available from: http://hdl.handle.net/10023/17968

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

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