Performance of the Sensory Anticipation Module.

Abstract

A. Model schematic of the ramping model (adapted from Egger and colleagues23). The model contains two competing units us and vs whose values decay to a stable point, driven by current I controlling the speed of this decay. Their difference yields ys, a ramping value which is compared with threshold, y0, at the time of a stimulus. The difference d = ys—y0 at the time of each tone is used to adjust I controlling the speed of the ramp to reduce d on the next interval. In our case, d is also used at the time of the probe tone to output a response to the behavioral trial. If d > 0, the model responds “late”; if dB. The model responses are then treated as behavioral data. Late and early responses are coded as 1 and 0 respectively and a logistic function is fitted, and the slope extracted to identify the precision of the responses relative to the relative and duration algorithms. Same procedure as the one applied to the behavioral data. Slope differences are shown here by stimulus rates at 1.2 Hz (red), 2 Hz (blue) and 4 Hz (gold). C. Slope difference relative to overall performance (slope sum) for the same stimulus rates. Black line represents polynomial fit, while the gray area represents the 95% confidence interval of the mean. Third order polynomial selected through AIC model selection. Data for S3 Fig can be found in S8 Data. (PNG)</p