Table 2

Means and SDs of the phase of CIx and CIy

	CIx mean	CIx SD	CIy mean	CIy SD
Monkey P
Initial	0.35 π	0.26 π	−0.14 π	0.23 π
Corrective	0.43 π	0.33 π	−0.15 π	0.36 π
Monkey Q
Initial	0.31 π	0.22 π	−0.15 π	0.30 π
Corrective	0.45 π	0.31 π	−0.05 π	0.37 π

All circular distributions of the phase of CIx and CIy were nonuniform (all p < 0.001^d).