Measurement invariance of the General Health Questionnaire GHQ 12-Item version (GHQ-12): a large UK longitudinal study across students and non-students
A randomised study of nurse collected venous blood and self‑collected dried blood spots for the assessment of cardiovascular risk factors in the Understanding Society Innovation Panel
Trialling event-triggered data collection in the Understanding Society Innovation Panel: response and measurement quality
Does the feedback of blood results in observational studies influence response and consent? A randomised study of the Understanding Society Innovation Panel
Estimating measurement error in longitudinal data using the longitudinal multitrait multierror approach