Table 5. Post-hoc comparisons between different test conditions.

	T	p-value
task A: inequity in reward quality
equity high-equity low	0.171	0.87
equity high-effort control high	2.88	0.03, n.s. after Bonferroni
equity low-effort control low	4.14	<0.001
equity high-effort control low	2.88	0.03, n.s. after Bonferroni
equity low-effort control high	1.72	0.14
equity high quality reward-quality control	8.23	<0.001
equity low quality reward-quality control
equity-inequity (high quality reward)	5.35	<0.001
equity-inequity (low quality reward)	2.61	0.04, n.s. after Bonferroni
effort control high-effort control low	2.38	0.06
effort control low-quality control	0.32	0.76
effort control low-inequity	1.03	0.35
effort control high-inequity	1.6	0.17
inequity-quality control	1.826	0.12
task B: inequity in the absence of food reward
equity-effort control	2.62	0.039, n.s. after Bonferroni
equity-no reward no partner	4.44	0.004
equity-both no reward	3.65	0.01
equity-inequity	3.74	0.009
effort control-no reward no partner	2.37	0.055
effort control-both no reward	1.56	0.169
effort control-inequity	1.65	0.15
no reward no partner-both no reward no partner	0.93	0.388
no reward no partner-inequity	0.83	0.438
both no reward- inequity	0.87	0.417

Differences between the parameter estimates have been divided by the standard error (SE) differences between pairs and interpreted the output as a t-test.