Drugs and the discrimination of duration

✍ Scribed by Jack L. Altman; James B. Appel; William T. McGowan

• Book ID: 104771770
• Publisher: Springer
• Year: 1979
• Tongue: English
• Weight: 594 KB
• Volume: 60
• Category: Article
• ISSN: 0033-3158
• DOI: 10.1007/bf00432291

✦ Synopsis

The effects of lysergic acid diethylamide (LSD), d-amphetamine (AMP), chlorpromazine (CPZ), and the most active isomer of marihuana (A9-THC) on timing behavior were analyzed with a twochoice, discrete trial procedure in which pigeons were trained to discriminate visual stimuli that differed with respect to duration ('long' vs. 'short'). LSD (0.01, 0.04, 0.16 mg/kg) decreased response speed (increased latency), but otherwise had no significant effects on performance of the discrimination, d-Amphetamine (1.0, 2.0, 4.0 mg/kg) increased perseveration or 'spatial bias' and, at a dose of 4.0 mg/kg, lowered response speed. This compound did not significantly alter accuracy (percentage correct). CPZ (7.5, 15.0, 30.0 mg/kg) significantly decreased accuracy and, at a dose of 30.0 mg/kg, significantly lowered speed; THC also decreased accuracy and lowered speed. Neither CPZ nor THC significantly altered perseveration.