highly significantP = 1 × 10 −5
Within-group comparisons of SI increases from T1 against T2 values yielded highly significant differences for CPP–PCs ( n = 57, 0.23 ± 0.05 bits per spike, mean ± s.e.m.; P = 1 × 10 −5 , T = 4.86, one-sample t -test) and SAL–PCs ( n = 61, 0.26 ± 0.07 bits per spike, mean ± s.e.m.; P = 4.5 × 10 −4 , T = 3.7, one-sample t -test).