Figure 4.
Context-induced meth-seeking after abstinence from SA. Lever pressing during the context tests resulted in no drug reinforcement or cue presentation. Active lever responding remained elevated for the three daily test trials (post-SA days 12, 13, and 14) in meth-experienced animals as compared with yoked-saline subjects (*p < .05; ***p < .001), but showed an extinction pattern between days 1 and 3 (p < .05).