Respondents were asked a series of statements and based on their answers a score of between 14 (lowest mental wellbeing) and 70 (highest) was assigned.
Gofynnwyd cyfres o ddatganiadau i'r ymatebwyr ac, yn seiliedig ar eu hatebion, rhoddwyd sgôr o rhwng 14 (y llesiant meddyliol isaf) a 70 (uchaf) iddynt.