Table 1 Descriptive statistics for research measures.

From: Sad mood and poor sleep are related to task-unrelated thoughts and experience of diminished cognitive control

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

  1. 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.
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