Circadian rhythmicity in prepulse inhibition of the acoustic startle response: A study of chronotype and time-of-day effects in young healthy adults.

The ToD × Trial Type interaction was marginally significant after co-varying for pulse-alone amplitude ( F (1.64, 51.03) = 3.49, p = 0.047, ηp 2 = 0.101); it became non-significant after covarying for schizotypy ( F (1.70, 54.38) = 1.85, p = 0.173, ηp 2 = 0.055) though there was no main effect or any interaction involving Schizotypy.

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