“This study examined whether chronic Δ9-THC during early adulthood would produce the same hormonally-dependent deficits in learning that are produced by chronic Δ9-THC during adolescence…
no significant effects of chronic treatment and no significant interaction between the chronic treatment and cannabinoid signaling. Thus, acute Δ9-THC produced hormonally-dependent effects on learning and performance behavior, but a period of chronic administration during early adulthood did not alter these effects significantly, which is contrary to what we and others have shown for chronic administration during adolescence.”