Figure 6.

Population coding efficiency. a, The mutual information in the 6 μm adaptation state (ordinate) and nonadapted state (abscissa). Various population sizes within a session are connected with a line. Multiple levels of brightness are used for better visibility. For each population size, the information content of all possible selections of that size were averaged within session. Error bars indicate the standard error of means. b, As in a, but for 12 μm adaptation state (ordinate) compared to the nonadapted state (abscissa). The y-axis is the same as the one in a. c, Mutual information between pooled single-unit responses and the total set of stimuli as a function of pool size. Different adaptation conditions are colored as per convention. Error bars are standard error of means across recording sessions. The data points after the break in the abscissa include multiunit clusters with the single-unit data to provide the full population response in each session. We estimate that these recordings consisted of between 17 and 45 single units.