Table 2.

Standard PRL and MBMF measures.

Task	Outcome measure	Placebo (n = 34)	Escitalopram (n = 32)
Probabilistic Reversal Learning Task	Stage 1 Mean Errors	0.88 (2.13)	2.28 (3.63)
	Stage 2 Mean Errors	5.82 (6.76)	6.88 (6.01)
	Stage 1 Switch Probability	0.44 (1.26)	0.72 (1.05)
	Stage 2 Switch Probability	0.76 (1.37)	0.88 (0.91)
Sequential Model-Based/Model-Free Task	Reward Common Transition	0.91 (0.29)	0.92 (0.28)
	Reward Rare Transition	0.88 (0.32)	0.81 (0.40)
	No Reward Common Transition	0.73 (0.44)	0.74 (0.44)
	No Reward Rare Transition	0.88 (0.33)	0.87 (0.34)