PROCESS PRAISE more effective than TRAIT PRAISE from 2008, I explained the difference between person praise (or trait praise) and process praise. In that post you can read that giving person praise (about personal traits or qualities) may be well-intended but has some negative consequences. A particular disadvantage of person praise is that it induces a fixed mindset. A fixed mindset is the belief that you have certain traits and talents which you can not really change. Process compliments, which are about what people have done, work better. They induce a growth mindset, which is the belief that people can change their traits and qualities by putting in effort.
Much research has shown that having a fixed mindset has many disadvantages compare to a growth mindset. For more details about this, read: Growth mindset associated with various positive outcomes (competence, relatedness, learning, vitality, adjustment).
After reading my posts, a solution-focused therapist sent me an e-mail saying: "My own reactions to the paper were initially a wholehearted interest in process rather than trait praise. But then I got to think about young people with very low self esteem, and thinking a bit of me still sees a potential value in commenting on traits they may not know they have." My response was that I thought it was a sensible hypothesis but that I'd predict that, even here, process feedback would work better. Back then, I had no evidence to support my prediction. But now I do.
Eddie Brummelman et al. (2013) studied the effects of person praise and process praise on children with low self esteem. Their conclusion is that person praise has negative impact on these children. For more details about this research read this post: Person Praise Backfires in Children With Low Self-Esteem.