Study Matlin & Gawron (1979): study US 1977

Public:

University students white, middle-class, State University of New-York, USA,197?

Sample:

Respondents:

N = 133

Non Response:

Assessment:

Questionnaire: paper
Questionnaire administered in class at two consecutive days.

Correlate

Authors's label

Optimism

Our Classification

Operationalization

Single direct question

Observed Relation with Happiness