Table 1.
Frequencies of selective cells
| Selectivity category | LMAN | X |
|---|---|---|
| tsBOS > tutor | 12 /43 (28%)† | 22 /60 (37%) |
| tsBOS > adult conspecific | 22 /39 (56%) | 31 /63 (49%) |
| tsBOS > juvenile conspecific | 14 /30 (47%) | 28 /51 (55%) |
| tsBOS > ts cut juvenile* | 7 /28 (25%) | 28 /48 (58%) |
| tsBOS > heterospecific | 27 /38 (71%) | 36 /62 (58%) |
| tsBOS > reverse tsBOS | 15 /37 (41%)** | 27 /54 (50%)** |
| tsBOS > reverse order tsBOS | 4 /27 (15%) | 10 /48 (21%)** |
| tsBOS > syllable reverse tsBOS | 4 /15 (27%) | 6 /15 (40%) |
| Tutor > tsBOS* | 2 /43 (5%) | 17 /60 (28%) |
| Tutor > adult conspecific | 7 /29 (24%) | 27 /61 (44%) |
| Tutor > heterospecific | 16 /28 (57%) | 31 /60 (52%) |
| Tutor > reverse tutor | 10 /21 (48%) | 12 /44 (27%)** |
| Tutor > reverse order tutor | 6 /22 (27%) | 13 /44 (30%) |
The ratio of selective cells over the total tested in each category is shown for LMAN and X cells, followed by the percentages. A cell was considered selective if it had a d′ value of at least 0.5 for the two stimuli compared.
*Comparisons for which the frequency of selective cells was significantly different between LMAN and X (χ2 tests,p < 0.05).
** Comparisons for which the frequency of selective cells was significantly lower in ts cut than in normal 60 d birds (χ2 tests, p < 0.05; normal 60 d data from Solis and Doupe, 1997).