Fig. 5: Exponential function of ‘go’ time captures RT differences between modalities.

a Within exponential, flipped exponential and Gaussian conditions, ∆RT curves were calculated by subtracting auditory RT curves from visual (blue) and somatosensory (magenta) ones. The ∆RT curves show a decrease over the range of ‘go’ times, most pronounced at shorter ‘go’ times, for all distributions. An exponential model (black curves) of ‘go’ time (Eq. (19)) captured the ∆RT curves’ behavior. b The fitted exponential model was added to the reciprocal, probabilistically-blurred PDF model fitted to auditory RT and plotted against visual and somatosensory RT. This combined model captured the previous deviations between data and model at shorter ‘go’ times in all conditions in both vision and somatosensation.