Is vague valid? The comparative predictive validity of vague quantifiers and numeric response options
Ethnic differences in maternal and teacher completed strengths and difficulties questionnaires: findings from the UK Millennium Cohort Study
Exploring role of interviewers in collecting survey respondents’ consent to link survey data to administrative records.
The untold story of multi-mode (online and mail) consumer panels: from optimal recruitment to retention and attrition
Propensity to consent to data linkage: experimental evidence from the Innovation Panel on the role of three survey design features
The role of the interviewer in producing mode effects: results from a mixed modes experiment comparing face-to-face, telephone and web administration