Table 1. Contrasts used to characterize tasks effects in our database.

We used CogPO categories for task-related description, and add necessary terms from Cognitive Atlas to describe higher-level cognitive aspect. Here we report only terms that were present in more than one study –aside from the “left foot”, which maps in the analysis as maps in “feet” task category, but not “right foot”. The task categories group terms typically used as conditions and their controls to test a hypothesis. The stimulus modality category stands for CogPO and task categories. Some terms do not belong to any task category and are referred to as such. The arithmetics task category spans across the response modality and instructions CogPO categories.

CogPO Categories	Task Categories	Terms	contrasts
Stimulus modality	-	visual	visual—auditory
		auditory	auditory—visual
Explicit stimulus	Sounds	human voice	human voice—sound
		sound	sound—human voice
	Retinotopy	vertical checkerboard	vertical checkerboard—horizontal checkerboard
		horizontal checkerboard	horizontal checkerboard—vertical checkerboard
	Object recognition	faces	faces—$\frac{1}{3}$(places + object + scramble)
		places	places—$\frac{1}{3}$(faces + object + scramble)
		objects	object—$\frac{1}{3}$(faces + places + scramble)
		scramble	scramble—$\frac{1}{3}$(faces + places + object)
	Symbol recognition	words	words—digits
		digits	digits—words
Response modality	Motor—hands	left hand	left hand—right hand
		right hand	right hand—left hand
	Motor—feet	left foot	left foot—right foot
		right foot	right foot—left foot
	Arithmetics	saccades	saccades
Instructions	Arithmetics	calculation	calculation
Cognitive Atlas term	No category	language	language