Table 1.

Comparison of R² values for linear and logarithmic functions (Experiment 1)^a

Interval duration	3018 ms	3310 ms	3629 ms	3979 ms	4363 ms	4784 ms
R2 of linear function	0.099 ± 0.004	0.105 ± 0.004	0.114 ± 0.004	0.117 ± 0.004	0.116 ± 0.005	0.118 ± 0.005
R2 of log function	0.102 ± 0.004	0.108 ± 0.004	0.117 ± 0.004	0.120 ± 0.005	0.119 ± 0.005	0.120 ± 0.005
p value (t test)	<10−7	<10−5	<10−5	<0.001	<10−4	<0.001

^aR² values of all analyzed neurons (n = 733) were compared for the regression models containing linear versus log-transformed time (Eq. 1) for each sample interval duration (mean ± SEM). R² values were significantly larger for the model containing log-transformed time for all interval durations (paired t test).