Dynamic causal modelling of precision and synaptic gain in visual perception - an EEG study.

One-way ANOVA with planned testing for a (linear) change in gain with hierarchical level showed a significant trend for contrast-dependent increases in lower sources and smaller, or no, contrast-dependent increases in higher sources of the hierarchy ( t 140 = − 2.472; p = 0.015) ( Fig. 6 ).

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