− | Rats CTA acquisition and extinction was measured with 24-h, 2-bottle preference tests (for ???? days). Rats were given 24-h free access to both 0.125% saccharin and water bottles, alternating position for ??? days. | + | Rats CTA acquisition and extinction was measured with 24-h, 2-bottle preference tests (for 10 days). Rats were given 24-h free access to both 0.125% saccharin and water bottles, alternating position for 10 days. |