Figure 7.

The tWTA onset detection accuracy. The stimulus detection ROC is presented, depicting hit probability (correct detection) as function of false alarm. Here, onset detection corresponds to a “detection” of a stimulus during the absolute delay period, 0 < t < T. Consequently, false alarm may scale with the absolute delay period, T. Moreover, a false alarm may be flagged in the absence of stimuli due to spontaneous firing of the neurons. Thus, a more relevant characterization of false alarm for stimulus onset detection task would be the false alarm rate during spontaneous activity. The inset shows average decision time and STD for different criterions (dots and bars, respectively) and the probability of having at least one false alarm during 1 s of spontaneous activity as a function of the detection threshold (asterisk). The parameters used for the simulation are the same as the parameters in Figure 6.