Table 2.

Results of repeated-measures ANOVAs comparing control and immigrant birds in the Immigrant Transfer Phase for (1) behavior (PCA-rotated factors one and two), (2) FGM, and (3) The level of call convergence using Mahalanobis distances

Variable	Control X ±SE	Transfer X±SE	Subject (Trt)		Treatment		Time period		Trt×Time period
			F statistic	P value	F statistic	P value	F statistic	P value	F statistic	P value
Behavior PCA factor one	–0.10±0.31	0.13±0.34	0.747,7	0.65	0.251,7	0.63	0.661,7	0.44	0.081,7	0.78
Behavior PCA factor two	–0.19±0.29	0.24±0.33	1.457,7	0.32	0.971,7	0.36	6.491,7	0.04	0.071,7	0.79
FGM	94.5±11.2	100.7±12.5	2.97,7	0.08	0.131.7	0.72	0.191,7	0.67	0.121,7	0.73
Call convergence	95.5±89.5	285.9±103.4	1.035,5	0.48	1.931,5	0.22	4.351,5	0.09	2.781,5	0.16

For FGM, we used a percentage of change from the baseline values (FGM value from week 19 pre-transfer) rather than the raw values. The time period for behavior and FGM included two time periods: weeks 1–2 and weeks 7–8. For vocal convergence, we divided week into two time periods: baseline and post-convergence