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Subjects’ keypad responses to the conditioned inhibition test trials (AB) in (A) subjects aware of the BX− contingency (n = 34) and (B) subjects unaware of the BX− contingency (n = 16). The stimulus was rated as “+” when the subject believed that stimulus was paired with the airblast, “−” when the subject believed that stimulus was not paired with the airblast, or “0” when the subject did not know. *p < .05 compared with “+” response in aware subjects.
