Outline how the sample was obtained in this study. advertisement;
(description)
in newspaper;
(detail)
in New Haven;
(detail)
aged 20-50;
(detail)
asking for men / a range of occupations;
(detail)
by direct mail;
(description / detail)
Payment / Incentive;
(detail)
Asking for people for a study on memory / learning / punishment;
(detail)
2
Description of sampling = 1 (definitive: advert / direct mail)
Detail = 1 (can award this mark independently of the description mark, but max 1)
Accept: 'white and blue collar workers'