COL6A1 and amnesia: In addition, and differently from wild-type mice, when tested in a habituation/dishabituation social task, Col6a1–/– mice did not display the characteristic decline in the time spent investigating a same-sex conspecific when becoming familiar (Fig. 1D), a pattern consistent with a social amnesia phenotype (Ferguson et al., 2000; Huang et al., 2014).