Table 1.

The conditional probability of collateral behaviors preceding a ‘short’ or ‘long’ response, p(C|R), and the conditional probability of a ‘short’ or ‘long’ response following each collateral behavior, p(R|C), calculated for each rat for the spatial discrimination task

Subject	Yule's Q	Z-score	p(R|C)	p(C|R)	C	R
Rat1	0.993	15.46	0.979	0.815	Sniffing ‘long’ lever	‘Long’
	0.840	6.92	0.897	0.326	Sniffing ‘short’ lever	‘Short’
	0.976	10.29	0.979	0.487	Grooming	‘Short’
	0.785	9.19	0.764		t = 6	‘Short’
			0.720		t = 12	‘Long’
Rat4	0.907	9.39	0.883	0.531	Sniffing ‘short’ lever	‘Short’
	0.920	10.84	0.907	0.733	Sniffing ‘long’ lever	‘Long’
	0.620	4.80	0.707	0.320	Mouthing dispenser	‘Short’
	0.49	9.44	0.698		t = 6	‘Short’
			0.841		t = 12	‘Long’
Rat 5	0.927	9.63	0.929	0.462	Sniffing ‘short’ lever	‘Short’
	0.997	14.87	0.993	0.780	Sniffing ‘long’ lever	‘Long’
	0.907	9.83	0.904	0.503	Mouthing dispenser	‘Short’
	0.956	13.93	0.838		t = 6	‘Short’
			0.895		t = 12	‘Long’
Rat 6	0.988	14.24	0.958	0.970	Sniffing ‘long’ lever	‘Long’
	0.995	15.18	0.980	0.902	Sniffing ‘short’ lever	‘Short’
	0.877	10.19	0.836		t = 6	‘Short’
			0.750		t = 12	‘Long’

The conditional probability of a ‘short’ or ‘long’ response occurring at t = 6 and t = 12 is also shown for each rat. The associated Z-score and Yule's Q statistics gauge the extent of each association.