Table 1. Descriptive statistics and internal consistencies (Cronbach’s alpha) for all study variables.

	Items	Range	M	SD	Cronbach’s alpha
(1) Age (1=below 30 yr, 2=31–50 yr, 3=older than 50 yr)	1	1–3	1.19	2.00	n.a.
(2) Sex (1=86 women, 2=82 men)	1	1, 2	n.a.	n.a.	n.a.
(3) Work interruptions	4	1–5	2.65	0.92	0.81
(4) Social stressors from supervisor(s)	3	1–5	2.04	0.92	0.84
(5) Attention failure	4	1–5	1.95	0.57	0.81
(6) Rumination	3	1–5	2.87	1.34	0.87

n.a.: not applicable