Spiga, Ralph
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9

Human methadone self-administration: Effects of diazepam pr..:

Spiga, Ralph ; Huang, David B. ; Meisch, Richard A..
Experimental and Clinical Psychopharmacology.  9 (2001)  1 - p. 40-46 , 2001
 
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10

Selection: Information and replicationof the operant:

Spiga, Ralph
Behavioral and Brain Sciences.  24 (2001)  3 - p. 556-557 , 2001
 
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13

MATCHING UNDER NONINDEPENDENT VARIABLE‐RATIO SCHEDULES OF D..:

Meisch, Richard A. ; Spiga, Ralph
Journal of the Experimental Analysis of Behavior.  70 (1998)  1 - p. 23-34 , 1998
 
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14

Context modulated effects of nicotine abstinence on human c..:

Spiga, Ralph ; Day, James D. ; Schmitz, Joy M....
Experimental and Clinical Psychopharmacology.  6 (1998)  4 - p. 390-398 , 1998
 
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