Study Gartstein & Rothbart (2002): study US Oregon 1997

Public:

3-12 months aged infants, Oregon, United States, 199?

Survey name:

Unnamed study

Sample:

Respondents:

N = 361

Non Response:

24%

Assessment:

Questionnaire: paper
Revised Infant Behavior Questionnaire; Raters mostly mothers (90%), data also collected from secondary caregiver (58% fathers) of 26 infants (4-12 months aged)

Correlate

Authors's label

Age

Our Classification

Operationalization

Group1: 3- 6 Months
Group2: 6- 9 Months
Group3: 9-12 Months

Observed Relation with Happiness