Figure 4.

Proportion of outbound error trials. a, Proportion of outbound error trials for each group and track plotted as a function of experiment day. Each point represents the proportion of error trials as a function of the total number of trials on a day of experience on a track, collapsed across animals in each group. Error bars represent SEM based on the binomial distribution applied to the number of error trials out of the total number of trials. Animals performed worse in the more novel track 2 compared with the more familiar track 1 within a day when data from both tracks were collapsed (Z test for proportions, p < 0.03), but the comparison was not significant for either track taken alone. b, Proportion of outbound error trials for each group and track plotted as a function of the day of exposure to each track. There is an overall trend of improvement in each track with a time course similar to that of the decline in CA1 firing rates.