Table 1 List of main variables and measurement
From: Boundarylessness and sleep quality among virtual team members – a pilot study from Germany
Construct (type of variable) | Measurement and source | Number of items |
|---|---|---|
Boundarylessness (IV) | Boundarylessness subscale of Work 4.0 questionnaire [39] | 5 |
Virtuality (IV, moderator) | Self-developed scale based on previous operationalisations [40,41,42,43] | 8 |
Psychological detachment (IV, moderator) | Psychological detachment subscale of Recovery Experience Questionnaire [34] | 4 |
Perceived stress (IV, mediator, DV) | Perceived Stress Scale [44] | 10 |
Sleep quality (DV) | Sleeping troubles subscale of Copenhagen Psychosocial Questionnaire (COPSOQ) [45] | 4 |