Table 3. Examining test performance and learning effects in the water tube experiments (3–6).

Examining the influence of experiment, trial, and bird on test success (Test Performance) and whether success increased with trial number (Learning Effects), thus indicating a learning effect.

	Test performance			Learning effects
	Posterior mean	Lower 95% CI	Upper 95% CI	Posterior mean	Lower 95% CI	Upper 95% CI
Choice number	0.002	1.39E−16	0.002	–	–	–
Heavy vs. light
Batido	1.36	−0.03	2.83	−0.01	−0.13	0.12
Margarita	0.29	−2.31	2.83	0.04	−0.17	0.26
Cerveza	−1.92	−4.06	0.10	0.13	0.05	0.32
Horchata	−1.01	−3.14	1.14	0.01	−0.20	0.19
Refresco	−0.13	−2.07	2.13	−0.01	−0.19	0.16
Tequila	0.22	−1.96	2.47	−0.003	−0.20	0.22
Heavy vs. light magic
Batido	−2.11	−4.66	−0.11	−0.06	−0.25	0.16
Margarita	−0.20	−3.63	3.14	−0.01	−0.32	0.28
Cerveza	2.13	−1.33	4.86	−0.18	−0.45	0.15
Horchata	2.60	−0.83	5.87	−0.03	−0.31	0.28
Refresco	−1.32	−4.73	1.92	0.33	0.03	0.62
Tequila	−1.05	−4.50	2.43	0.17	−0.17	0.50
Narrow vs. wide
Batido	−1.12	−3.10	0.88	0.01	−0.15	0.19
Cerveza	−0.21	−3.61	2.74	0.06	−0.20	0.33
Refresco	−0.48	−3.49	2.77	0.02	−0.23	0.25

Notes.

GLMM: Choices Correct ∼Experiment*Trial*Bird, random, ∼Choice Number. CI, credible intervals, Batido in italics indicates the intercept.