On quantifying multisensory interaction effects in reaction time and detection rate.

摘要: Both mean reaction time (RT) and detection rate (DR) are important measures for assessing the amount of multisensory interaction occurring in crossmodal experiments, but they often applied separately. Here we demonstrate that measuring performance using either RT or DR alone misses out on information. We suggest an integration into a single measure performance: first index (MRE*) is based arithmetic combination DR, second (MPE) constructed from parameters derived fitting sequential sampling model to data simultaneously. Our approach illustrated by two audio–visual experiments. In first, redundant targets experiment stimuli different intensity, both yield similar pattern results supporting “principle inverse effectiveness”. The experiment, introducing stimulus onset asynchrony differing instructions (focused attention vs. task) further supports usefulness indices. Statistical properties investigated via bootstrapping procedures.