Table 1.

Experimental flow.

Group A	Group B
Preexperiment questionnaire	Preexperiment questionnaire
↓	↓
Subjective task (main)	Subjective task (control)
↓	↓
Subjective questionnaire A	Subjective questionnaire B
↓	↓
Subjective task (control)	Subjective task (main)
↓	↓
Subjective questionnaire A	Subjective questionnaire B
↓	↓
Experiment 1 (a → b)	Experiment 1 (b → a)
↓	↓
Postexperiment questionnaire A (main)	Postexperiment questionnaire B (main)
↓	↓
Experiment 2 (a → b)	Experiment 2 (b → a)
↓	↓
Postexperiment questionnaire A (control)	Postexperiment questionnaire B (control)

Blanks in purple: experimental task; blanks in blue: questionnaire. The symbol a → b (b → a, respectively) represents the order of the task from a to b (from b to a, respectively) (a: monkey's hand position with open eyes; b: monkey's hand position with closed eyes).