One found no significant change; the other five out of six measures found significantly less weight gain, and risk of abdominal obesity, in those eating more nuts. (nutritionfacts.org)
The results are pretty clear: doing well on either or both of the impulse - control tests predicts less weight gain nine years later. (sweatscience.com)
The only other study showing weight gain found the same thing — five times less weight gain than expected. (nutritionfacts.org)