We also examined post error slowing.
By contrast, facial expression had no influence on other behavioral measures in the flanker task such as reaction times and post error slowing.
Participants showed significant post error slowing (F (1,21) = 28.99, p<.001) but this was not modulated by expression (F (2,42) = 0.61, p<.94, see table 2).
Prior to error-correction the average base Q score was ~ 9.6, post error-correction these qualities increased to between 47 and 57, indicating that error correction was successful.
Thus, for a plant that continues from period t+1 to t+2,X(st+1)=0 and the ex-post errors are as defined earlier.
For a plant that exits in period t+1,X(st+1)=1 and the ex-post errors become ε t = − γ θ t L t α q t γ + w t q t L t + I t U λ U + I t D λ D w t q t − w t − 1 q t − 1 w t − 1 q t − 1 w t q t L t − 1, (17).
Neither drug affected post-error slowing.
The ex-post error for q t is the same as (15).
The imaging design accommodated variability immediately before errors (handedness of response) and immediately after (degree of post-error slowing) using distinct within-trial regressors.
Consistent with the role of these structures in modulating dopamine output, post-error slowing also increased activities in the same structures that deactivated on error detection.
The system used for estimation involves endogenous variables (revenue, employment, and wage bill) and has four unknown parameters and two equations that determine ex-post error terms.
