TABLE 2.
Critical ratio (dB) | 500 Hz | 1000 Hz | 2000 Hz | 4000 Hz |
---|---|---|---|---|
Present study (shock avoidance) | 25 | 26 | 30 | 31 |
Niemiec 1992 (positive reinforcement) | 29 | 26 | 30 | 33 |
Seaton and Trahiotis 1975 (shock avoidance) | 16 | 19 | 25 | 31 |
Miller 1970 (shock avoidance) | 22 | 23 | 27 | 30 |
Results were similar to those reported by Miller (1970) and Niemec (1991)