Model | (Morita and Kato, 2014) | (Kato and Morita, 2016) | Present work |
---|---|---|---|
Mechanisms that have been incorporated | |||
Decay/forgetting of learned values | ✓ | ✓ | ✓ |
Self-paced behavior as Go or Stay selection | ✓ | ✓ | |
Secondary effects of DA depletion | ✓ | ||
Temporal difference in D1 and D2 pathways | ✓ | ||
Phenomena that could be explained | |||
Sustained/ramping DA signals | ✓ | ✓ | ✓ |
Slowdown by DA depletion | partial (not about temporariness) | ✓ | |
Effort impairment by DA depletion | partial (not about Condition 3) | ✓ | |
Effort impairment by D1 or D2 antagonism | ✓ |
The mechanisms that have been incorporated, and the phenomena that could be explained, are shown for the present model and the previous models.