Achievement motives and emotional processes in children during problem-solving: Two experimental studies of their relation to performance in different achievement goal conditions
Motivation and Emotion (2011) - Comment
pubmed: 22081734  doi: 10.1007/s11031-011-9224-y  issn: 0146-7239  issn: 1573-6644 

Gunnar Bjørnebekk, Torgrim Gjesme, Robin Ulriksen