No deficit in the cortical phase-locking of multi-unit responses in Cntnap2^−/− rats. (A) Cortical spike timing in relation to stimulus phase was determined using vector strength, measured at the various repetition rates for each multi-unit cluster. A higher value signifies more precise spike timing. (B) The significance of the phase locking is measured with the Rayleigh statistic, where >13.82 indicates P < 0.001. Data represented as mean ± SE. ^*P < 0.05.