Table 1.

Descriptive statistics for research measures.

Measures	Score	N	M	SD	Skew	Kurtosis	Cronbach’s α
OSPAN Score	Sum	514	22.49	9.71	0.04	−0.93	0.83
PROMIS Sleep Disturbances	Mean	574	1.65	0.83	0.32	−0.62	0.90
Social Desirability Tendency	Rate	574	0.58	0.19	−0.32	−0.10	0.66
2-back Task-unrelated thoughts	Rate	557	0.21	0.21	1.14	1.16	0.84
2-back Unguided thoughts	Rate	557	0.30	0.26	0.71	−0.34	0.88
2-back Trying to concentrate	Mean	557	2.98	0.71	−0.56	−0.06	0.95
2-back d’ score	Mean	557	1.61	0.56	−1.16	0.78	0.94

Note. We estimated reliability for each 2-back variable by computing the score for each block type (i.e., 10 vs. 20. vs 30 trials per block) and then treating those three block types as scale items.