Table 2.

Results of statistical tests for each of the studied ERP-components.

Component	Effect	Effect slope	χ2
P200	Word length	0.030
	Word log-frequency	0.062
	Word class	0.018
	Document preference	−0.006
	Information gain	0.074	4.68
m R2/c R2		0.003/0.016
P300	Word length	0.068
	Word log-frequency	0.025
	Word class	−0.009
	Document preference	0.011
	Information gain	0.053	2.72
m R2/c R2		0.007/0.079
N400	Word length	0.082
	Word log-frequency	0.100
	Word class	0.009
	Document preference	0.013
	Information gain	0.116	7.73*
m R2/c R2		0.010/0.035
P600	Word length	0.030
	Word log-frequency	0.040
	Word class	0.019
	Document preference	0.004
	Information gain	0.076	3.46
m R2/c R2		0.006/0.012

Columns and notation as in 1. The p-values have been Bonferroni corrected with m = 4.