Table 4.

Outcomes of the one-sample t-tests for data from Phase 4.

	t test value	p
Choose Smaller
Chewie	3.71	0.001*
Gretel	−0.23	0.821
Griffin	1.22	0.237
Han	1.91	0.071
Hank	2.60	0.017*
Lexi	−2.57	0.018^
Logan	3.66	0.002*
Lou	0.13	0.901
Nala	2.24	0.036*
Star	−3.05	0.006^
Wren	0.93	0.365
Choose Larger
Bias	5.84	<0.001*
Gambit	3.99	0.001*
Gonzo	−2.39	0.027^
Liam	−4.31	<0.001^
Mason	6.67	<0.001*
Murph	1.98	0.062
Nkima	−2.68	0.014^
Widget	0.53	0.603

Note. The df for all of these tests was 20.

^*indicates that for a given monkey, performance was better when the smaller array was at left compared to right.

^{^}indicates that for a given monkey, performance was better when the smaller array was at right compared to left.