Time pressure undermines performance more under avoidance than approach motivation
Personality and Social Psychology Bulletin (2013) - Comment
pubmed: 23554176  doi: 10.1177/0146167213482984  issn: 0146-1672  issn: 1552-7433 

Marieke Roskes, Andrew J. Elliot, Bernard A. Nijstad, Carsten K. W. De Dreu