I just stumbled on a blog post that asserts that more intelligent people drink more than less intelligent people.
The author writes:
Controlling for a large number of demographic variables, such as sex, race, ethnicity, religion, marital status, number of children, education, earnings, depression, satisfaction with life, frequency of socialization with friends, number of recent sex partners, childhood social class, mother's education, and father's education, more intelligent children grow up to drink more alcohol in the UK and the US.
The data presented reportedly comes from the National Child Development Study (NCDS) in the United Kingdom and the National Longitudinal Study of Adolescent Health (Add Health) data in the United States. However, the author does not cite a particular reference where such analyses are reported.
Furthermore, I also wonder about what the meaning of any association between intelligence and alcohol consumption would be after controlling for so many factors. In particular, mother's education, father's education, social class, and education together should predict a lot of variance in intelligence.
- What articles report the actual analyses mentioned in the blog post? Or what other articles summarise the relationship between intelligence and alcohol consumption?
- What is the relationship between intelligence and alcohol when you don't control for other factors?
- How does the relationship change between intelligence and alcohol consumption when you introduce some but not all of the covariates? In particular, which if any covariates modify the relationship between intelligence and alcohol consumption?
- Taken in totality is it reasonable to assume that intelligence has a causal effect on alcohol consumption?