Attitudes towards cannabis and cannabis law change in a New Zealand birth cohort.

Personal cannabis use is common across New Zealand, and an upcoming referendum will enable the public to vote on whether this should be legalised. The present research aimed to examine the attitudes of midlife New Zealand adults on cannabis use and legalisation, and to identify potential predictors of those attitudes.At age 40, 899 participants drawn from the Christchurch Health and Development Study were interviewed about the perceived...