Increased CS+ acquisition and decreased extinction counterbalanced each other in the prediction of stress during Part 2 (early extinction, p=0.033; full extinction, p=0.084) and Part 3 (early extinction, p=0.019), and in the prediction of anxiety during Part 2 (GAD: early extinction, p=0.019; full extinction, p=0.006) during Part 2. The gene discussed is GAD1; the disease is Anxiety.