PT  - JOURNAL ARTICLE
AU  - Chandramouli Chandrasekaran
AU  - Matthias Gondan
TI  - Audiovisual detection at different intensities and delays
AID  - 10.1101/173773
DP  - 2017 Jan 01
TA  - bioRxiv
PG  - 173773
4099  - http://biorxiv.org/content/early/2017/09/05/173773.short
4100  - http://biorxiv.org/content/early/2017/09/05/173773.full
AB  - In divided-attention tasks with two classes of target stimuli (e.g., auditory and visual), redundancy gains are typically observed if both targets are presented simultaneously, as compared with single-target presentation. Different models explain such redundant-signals effects, including race and coactivation models. Here we generalize one such coactivation model, the superposition model, and show that restricting this evidence accumulation process to a limited time interval, that is a temporal deadline, provides the model the ability to describe the detection behavior of two monkeys across a wide range of intensities and stimulus onset asynchronies. We present closed-form solutions for the mean absorption times and probabilities for the two-stage diffusion process with drift towards a single barrier in the presence of a temporal deadline.