In response to my post When children have low self esteem should you then give them person praise?, David Winter asked: "Do you know of any research on the effects of person vs process criticism instead of praise? My assumption would be that person-focused criticism is more damaging than process-focused but it would be nice to have some evidence.".
There is indeed such research. Here it is:
Person versus process praise and criticism: Implications for contingent self-worth and coping (Kamins & Dweck, 1999).
Abstract: Conventional wisdom suggests that praising a child as a whole or praising his or her traits is beneficial. Two studies tested the hypothesis that both criticism and praise that conveyed person or trait judgments could send a message of contingent worth and undermine subsequent coping. In Study 1, 67 children (ages 5–6 years) role-played tasks involving a setback and received 1 of 3 forms of criticism after each task: person, outcome, or process criticism. In Study 2, 64 children role-played successful tasks and received either person, outcome, or process praise. In both studies, self-assessments, affect, and persistence were measured on a subsequent task involving a setback. Results indicated that children displayed significantly more "helpless" responses (including self-blame) on all dependent measures after person criticism or praise than after process criticism or praise. Thus person feedback, even when positive, can create vulnerability and a sense of contingent self-worth.