Table 2.

The Fourier coefficients for the surrogate and LGN data follow a Gaussian distribution. We sampled the Fourier coefficients 128 times for each of the 2560 sine and cosine terms that we tested for each cell. Each distribution was tested with two standard tests for normality: the Shapiro–Wilk's test and the Lilliefors test. The percentage of distributions that passed each test at the p < 0.05 significance level was calculated for each cell, and the table gives the mean and standard deviation for the test results.

	Repeats (% passed)		Uniques (% passed)
TEST	SHAPIRO–WILK	LILLIEFORS	SHAPIRO–WILK	LILLIEFORS
Surrogate data (12 cells)	95.3 ± 0.31	95.2 ± 0.34	95.3 ± 0.41	95.1 ± 0.3
LGN cells (9 cells)	94.9 ± 1.62	94.6 ± 0.35	93.9 ± 1.31	94.6 ± 0.45