Bradley D V, Blough P M
Brown University, Dept of Psychology, Providence, RI 02912.
Psychopharmacology (Berl). 1993;111(1):117-22. doi: 10.1007/BF02257417.
In a psychophysical task that permitted dissociations among sensitivity, overall stimulus control, and bias, pigeons learned to discriminate among stimuli along separate wavelength and luminance dimensions. Subsequent tests followed injections of morphine (1-8 mg/kg) and morphine plus naloxone (3 mg/kg). Morphine decreased sensitivity to both dimensions, and reduced overall control by luminance. These effects were reduced or reversed by naloxone. Morphine's effects appeared more pronounced for luminance than for wavelength stimuli. There were no consistent drug effects on response bias.
在一项允许区分敏感度、整体刺激控制和偏差的心理物理学任务中，鸽子学会了沿着不同的波长和亮度维度区分刺激。随后在注射吗啡（1 - 8毫克/千克）以及吗啡加纳洛酮（3毫克/千克）后进行测试。吗啡降低了对两个维度的敏感度，并减少了亮度对整体的控制。这些效应被纳洛酮减弱或逆转。吗啡对亮度刺激的影响似乎比对波长刺激更明显。对反应偏差没有一致的药物效应。
