Positive affect as informational feedback in goal pursuit
Motivation and Emotion (2011) - Comment
pubmed: 21423342  doi: 10.1007/s11031-010-9197-2  issn: 0146-7239  issn: 1573-6644 

Edward Orehek, Elena Bessarabova, Xiaoyan Chen, Arie W. Kruglanski