MCAT Question of the Day 120– Psychology

Given the description of the study in this passage, which unknown factor might have the most influence on the validity of the results?

Question posted with permission from The Princeton Review

 

By | 2017-08-15T06:45:33+00:00 November 23rd, 2015|Interacting with Environment, Princeton Review, Psychology and Sociology, Question of the Day|Comments Off on MCAT Question of the Day 120– Psychology