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Fig. 5. Acquisition, extinction and facilitated extinction of CRs in moths
receiving different treatments during the extinction phase. (A) Acquisition
and extinction in moths receiving different extinction treatments. No
significant between-group differences were found, indicated by the letters NS
(MannWhitney tests, P>0.05). (B) Extinction curves for
moths that have learned the CS. Only moths showing CR at the first extinction
test were included. Pairing of linalool with quinine or sinigrin induced a
more rapidly decreasing number of responses than the control. Different
letters indicate significant between-group differences (MannWhitney
tests, P<0.05).