Table 2 Output of Linear Mixed Models testing for parrot vocal mimicry repertoire variation associated with (a) age, (b) sex, and/or (c) social interactions with other parrots.
Fixed factor | Response | Estimate | Std Err | DFDen | t | p |
|---|---|---|---|---|---|---|
(a) Age | Sounds | 0.00087 | 0.0035 | 655 | 0.25 | 0.80 |
Words | − 0.0033 | 0.0044 | 653 | − 0.75 | 0.46 | |
Phrases | − 0.0043 | 0.0041 | 613.9 | − 1.05 | 0.30 | |
(b) Sex | Sounds | − 0.0079 | 0.035 | 702.4 | − 0.23 | 0.82 |
Words | − 0.028 | 0.042 | 704.6 | − 0.67 | 0.50 | |
Phrases | − 0.045 | 0.040 | 671.4 | − 1.13 | 0.26 | |
(c) Social—any parrot | Sounds | − 0.035 | 0.034 | 788.4 | − 1.01 | 0.32 |
Words | − 0.027 | 0.043 | 788.1 | − 0.62 | 0.53 | |
Phrases | 0.029 | 0.041 | 742.8 | 0.71 | 0.48 | |
Social—conspecifics | Sounds | 0.046 | 0.040 | 791.1 | 1.14 | 0.25 |
Words | 0.049 | 0.050 | 788.3 | 0.97 | 0.33 | |
Phrases | 0.023 | 0.048 | 743.8 | 0.47 | 0.64 |
