Localization in the midsagittal plane. A: raw data (% correct scores for 40-ms noise bursts as a function of the vertical angular separation of the speakers) and the fitted psychometric function, from which the minimum audible angle (MAA) was calculated, for animal F0249. These data were obtained before any cortical manipulation. B–D: control data for all the animals. Each line represents the psychometric function from a different animal for stimulus durations of 500 ms (B), 200 ms (C), and 40 ms (D). Mean MAAs, corresponding to the 75% score, were 27.0 ± 7.7° at 500 ms, 31.7 ± 6.3° at 200 ms, and 35.3 ± 9.6° at 40 ms.