Instrumental conditioning for food reinforcement in the spontaneously hypertensive rat model of attention deficit hyperactivity disorder

Table 1 Performance on the spontaneous alternation task

	Strain
	SHR	WKY	WIS
Total number of arm entries (mean ± SEM)	7.50 ± 0.76	10.00 ± 1.29	9.00 ± 0.36
Latency to first arm (s) (mean ± SEM)	12.39 ± 3.21	9.07 ± 3.45	9.53 ± 3.21
Total number of alternations [median (IQR)]	1.00 (1.00–1.25)	2.50 (1.00–3.25)	2.50 (2.00–3.00)
Discrimination index [median (IQR)]	0.13 (0.11–0.25)	0.22 (0.17–0.26)	0.28 (2.40–0.31)

Data for the normally distributed variables are expressed as the mean ± SEM for each of the strains and the non-normally distributed variables are given as median (inter-quartile range)

ISSN: 1756-0500