Two of the personality types only change a little bit. These aren’t considered unusual in the study. The other two groups are of particular interest.
The first group, called the “Mary Poppins” had almost no change. When they drink they remain almost as if they were sober. Their personality does not change.
The next group, called, “Mr. Hydes” have a big change. They become meaner, and make more regrettable choices.
It includes poorer grades or regrettable sex. It’s also worth noting this group had the highest proportion of women (two-thirds, with the sample being overall 57 percent women).