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. Author manuscript; available in PMC: 2018 May 1.
Published in final edited form as: Cortex. 2017 Mar 20;90:115–124. doi: 10.1016/j.cortex.2017.02.021

Figure 2.

Figure 2

Cost of conflict task performance. Age and sex matched controls are presented for qualitative comparison, but all analyses focused on ON versus OFF medication effects. A) Error rate did not differ due to medication status. RTs showed a linear trend for slower RTs OFF meds compared to ON, but this was not statistically significant. RT conflict (incongruent RT – congruent RT) was similar ON and OFF medication. B) In a post-training test phase, learning biases were assessed via two alternative forced choices. There was no difference in the ability to discern the best>worst option (A>D). Contrary to predictions, there was no effect of the medication manipulation in the cost of conflict effect (B>C). C) When split by recency of diagnosis, the expected cost of conflict effect due to medication manipulation occurred only in the recently diagnosed group. *p<.05 **p<.01