| Experimental measures of behavior and neural activities | First, neuron is trial-averaged activity in response to each tested stimulus s is given by the peri-stimulus time histogram ( PSTH ) or time-varying firing rate, mi(t; s) (Fig. |
| Experimental measures of behavior and neural activities | In so-called “fine” discrimination tasks, the stimuli 5 display only moderate variations around the central value so, so that the PSTH at each instant in time can often be approximated by a linear function of s: mi(t ; s) 2 m? |
| Experimental statistics of neural activity and choice | Here, 141(5) is the psychometric curve, mi(t; s) is known as the PSTH , and Cz-J-(t, u; s) as the IPSTH. |
| Prediction of spikes | With this small number of inputs, the average response only weakly matches the peri-stimulus time histogram ( PSTH ) of observed spike responses (R = 0.09:0.02, PSTHs estimated by a maximum likelihood, fixed bandwidth kernel density estimator). |
| Prediction of spikes | 9, middle), and the simulated PSTH more accurately matches the observed responses to repeated trials (R = 0.73:0.06). |
| Prediction of spikes | Similarly, the bilinear model reproduces the PSTH with R = 0.10:0.02 and R = 0.55:0.04 When 5% and 100% of the inputs are observed, respectively. |