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. Author manuscript; available in PMC: 2013 Oct 1.

Published in final edited form as: Psychophysiology. 2012 Aug 22;49(10):1372–1383. doi: 10.1111/j.1469-8986.2012.01457.x

Table 2. Correlation matrix for schizophrenia and control groups separately displaying Pearson Correlation (r) and corresponding p-value (p) for correlations between Education or IQ and the effect of current Δf on behavioral responses (Δf), N1 ERP amplitudes (N1), P2 ERP amplitudes (P2), the effect of prior Δf on behavioral responses (Prior Δf), or the effect of prior perception on behavioral responses (Prior Perception).

Schizophrenia
	Δf/	N1	P2	Prior Δf	Prior Perception
Education [r, (p)]	.201 (.410)	.269 (.238)	−.347 (.124)	−.326 (.173)	−.296 (.219)
IQ [r, (p)]	−.174 (.475)	.082 (.722)	−.120 (.604)	.022 (.929)	.042 (.864)

Control

	Δ f	N1	P2	Prior Δf	Prior Perception
Education [r, (p)]	.031 (.894)	−.150 (.515)	−.329 (.145)	−.065 (.780)	.224 (.330)
IQ [r, (p)]	.086 (.711)	−.098 (.673)	−.165 (.474)	−.105 (.651)	.203 (.379)