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ABR-derived critical ratio function at 26 dB/Hz (closed circles) compared to the behavioral critical ratio function (open circles; Dooling and Saunders, 1975; Okanoya and Dooling, 1987, 1990; Hashino and Sokabe, 1989; Farabaugh et al., 1998; Lohr et al., 2004) in (A) budgerigars, (B) canaries, and (C) zebra finches. (D): Difference between ABR and behavioral measures of CR, in budgerigars (circles), canaries (triangles), and zebra finches (squares). Error bars are standard deviations.
