What has the author Ingvar Werdelin written?

Answer 1

Ingvar Werdelin has written:

'Teacher ratings, peer ratings, and self ratings of behavior in school' -- subject(s): Rating of, Self-rating of, Students

'Factor analyses of an inventory in social situations' -- subject(s): Anxiety, Child psychology, Factor analysis, Methodology

'On the quality of the educational system as seen from the point of view of educational statistics' -- subject(s): Educational planning, Statistical methods

'Participatory research in education'

'Quantitative methods and techniques of educational planning' -- subject(s): Educational planning

'A study of age differences in factorial structure' -- subject(s): Ability, Influence of age on Ability, Testing

'Handbook of educational research methods research designs'