Study VanVaalen (2010): study NL 2009

Public:

Schoolchildren aged 9-12, the Netherlands, 2009

Sample:

Respondents:

N = 718

Non Response:

Assessment:

Questionnaire: paper
Questionnaire completed in class

Correlate

Authors's label

Gender

Our Classification

Operationalization

0 Girls
1 Boys

Observed Relation with Happiness