In this case, Gprasp2−/y mice spent less time overall engaging in social interaction and also displayed a lower index of preference for the novel stimulus (Fig. 8d, e), however, the lack of preference for the ‘S2’ partner may result from both social recognition deficits compounded with the memory impairments displayed by Gprasp2−/y mice. The gene discussed is GPRASP2; the disease is memory impairment.