Eye-catching studies that didn't make the final cut:
When testing the effectiveness of psychological therapies, does it make any difference whether the research is conducted in the unpredictable world of the clinic or if it is instead performed under carefully controlled conditions?
Alcohol affects the sexual decision making of men and women in different ways.
How stress from commuting can spill over into the workplace.
Under what conditions do we root for the underdog? (Would be interesting to see cross-cultural research on this).