Casglwyd y data trwy holiaduron arolwg ar-lein a gwblhawyd gan 179 o yfwyr a recriwtiwyd drwy hysbysebion a chyhoeddiadau'r cyfryngau cymdeithasol ar fewnrwyd dwy o Brifysgolion Cymru. Cynhaliwyd cyfweliadau gyda 41 o yfwyr a gafodd eu recriwtio drwy Arolwg Cenedlaethol Cymru, dwy brifysgol, sefydliadau'r trydydd sector a'r arolwg ar-lein.
Data were collected through online survey questionnaires which were completed by 179 drinkers recruited through social media advertisements and announcements on two Welsh university intranet websites. Interviews were conducted with 41 drinkers recruited through the National Survey for Wales, two universities, third sector organisations and the online survey.