Table 1.

A list of caveats for each step of the tasks

Task	Caveat
Habituation	If the marmoset shows any agitated behavior, the training is stopped.
Dish- or spout pole-pull task	Dish or spout pole is placed at a location whose distance from the marmoset is equivalent to that of the maximum reach of the marmoset. If motivation is not apparent, the food is changed.
Self-initiated pole-pull task without head fixation	Repeat this step until the marmoset concentrates on the task and does not move their head too much over several sessions.
Visually cued pole-pull task	The penalty extending the blank period is critical in training the marmoset not to pull the pole during the blank period.
One-target reaching task	The holding time within the target square should be gradually increased as the training progresses.
Two-target reaching task	Increase the proportion of target 2 trials in early sessions.
Force-field adaptation task	If the marmoset stops the task during the FF block, the velocity-dependent force is reduced.