Fig. 5. Sensitivity to novel feedback during one of the three major phases of a single electric organ discharge (EOD). The diagrams show for each animal the probability of a novelty response when the electronic switch was closed for a brief interval of 100 µs that either centred at one of the extrema of the EOD (V₂, V₃, V₄; see inset) or after the EOD (Control, C; zero for Fish 3 and 6). The horizontal dotted lines indicate the `baseline' of responses (determined from recordings in the absence of switch closure) due to spontaneous fluctuation in the discharge rate of the animal. Each diagram comprises the results of 125 tests (approximately 25 per stimulus condition). Insets indicate the relative position of the two shunting electrodes at the trunk/tail region in relation to the fish's total length (TL).