The frequency of Ineffective Tool Actions (ITA) in trials in which either the ball or the stick was used to retrieve the reward.

This table depicts the mean number of ITA per trial in which the reward was finally retrieved using the ball tool (column 3) or the Stick tool (column 6) as well as the % of ITA in which the stick (or the ball respectively) was inserted into inappropriate openings before succeeding with one of the two tools.