Table 2 |.

Differences in working memory task across datasets

	HCP	ABCD	PNC
Type	Zero-back, two-back	Emotional zero-back, two-back	Zero-back, one-back, two-back
Stimuli	Places, faces, tools and body parts	Happy, fearful and neutral facial expressions; place stimuli	Fractals
Run duration	5 min	5 min	11.6 min
Task cue at start of each block	2.5 s	2.5 s	9 s
No. of task blocks per run	8 × 25 s per block (4 for each n-back)	8 × 25 s per block (4 for each n-back)	9 × 60 s per block (3 for each n-back)
No. of trials per block	10 × 2.5 s per trial	10 × 2.5 s per trial	20 × 3 s per trial
Target to non-target trials ratio	1:5	1:5	1:3
Each trial	2 s stimulus + 0.5 s ITI	2 s stimulus + 0.5 s ITI	0.5 s stimulus + 2.5 s ITI
No. of fixation blocks per run	4 × 15 s per block	4 × 15 s per block	3 × 24 s per block
Reference	Barch et al.64	Casey et al.2	Satterthwaite et al.23

ITI, intertrial interval.