Table 1

Cognitive tasks

Task	Outcome measure	Description of task	Units	Psychological domain
Groton Maze Learning	Accuracy of performance	Navigate maze without errors	No of errors	Executive function
Detection (simple reaction)	Speed of performance	Respond to playing card turning over	log₁₀ ms	Psychomotor
Identification (choice reaction)	Speed of performance	Respond to colour of playing card	log₁₀ ms	Attention
One-card Learning	Accuracy of performance	Remembering previous playing cards	Arcsine accuracy	Visual memory
Groton Maze Learning Recall	Accuracy of performance	Navigate maze without errors	No of errors	Executive function