On
the well-learned task, increased magnitude of reward was associated
with better performance whereas on the novel task, increased
magnitude of reward was associated with reduced performance.
Under low magnitude
of reward, the novel task was performed better than the well-learned task.
Under high magnitude of reward, the well-learned task was performed better
than the novel task.
The difference between the novel task and the well-learned
task changed from positive for low magnitude of reward to slightly
negative for medium magnitude of reward to very negative for high
magnitude of reward.