Table A1.
Cronbach’s alpha for each subscale (or entire scale *) from the study sample and from German validation studies; factor analysis confirmation with eigenvalues above 1.
| Questionnaire | Subscale (n Items) | Cronbach’s Alpha Study Sample/Validation Study | Factor Structure (Confirmatory) Eigenvalues Above 1 |
|---|---|---|---|
| BFI-K (21 Items) | extraversion (4) | 0.821/0.81 | 5-factor structure confirmed; explained variance: 58.0% |
| agreeableness (4) | 0.618/0.67 | ||
| conscientiousness (4) | 0.722/0.62 | ||
| neuroticism (4) | 0.781/0.65 | ||
| openness (5) | 0.703/0.70 | ||
| ZTPI (56 Items) | past positive (9) | 0.746/- | 5-factor structure confirmed; explained variance: 38.3% |
| past—negative (11) | 0.844/- | ||
| present—hedonistic (15) | 0.802/- | ||
| present—fatalistic (9) | 0.694/- | ||
| future (13) | 0.757/- | ||
| BIS (30 Items) | motor (11) | 0.707/0.74 * | 3-factor structure confirmed; explained variance: 34.4% |
| planning (11) | 0.677/0.74 * | ||
| attention/cognition (8) | 0.581/0.74 * | ||
| FFA (14 Items) | presence (5) | 0.622/0.69 | 2-factor structure confirmed; explained variance: 40.6% |
| acceptance (9) | 0.793/0.77 | ||
| SEE (42 Items) | imaginative symbolisation (6) | 0.837/0.82 | 7-factor structure confirmed; explained variance: 56.1% |
| emotion regulation (4) | 0.676/0.70 | ||
| overwhelming emotions (7) | 0.870/0.86 | ||
| bodily symbolisation (8) | 0.799/0.80 | ||
| self-control (6) | 0.767/0.76 | ||
| accepting one’s emotions (6) | 0.858/0.82 | ||
| lack of emotions (5) | 0.775/0.70 | ||
| Subjective time questionnaire (15 Items) | time pressure (8) | 0.813/- | 3-factor structure confirmed; explained variance: 56.7% |
| expansion/boredom (5) | 0.822/- | ||
| routines in life (2) | 0.625/- |
* In German validation study of the BIS [46] Crobach’s alpha was only calculated for the sum scale.