Study Langeveld et al. (1999): study NL 1997
- Public:
- 12-18 aged headache patients, The Netherlands, 1997
- Sample:
- Respondents:
- N = 64
- Non Response:
- 15%
- Assessment:
-
Multiple methods
Questionnaire and diary
Correlate
- Authors's label
- Trait negative affectivity (NA)
- Our Classification
-
-
- Operationalization