(S (S (PP (IN Unlike) (NP (BASENP (NNP Dweck) (POS 's)) (BASENP (JJ clinical) (NN study)))) (COMMA ,) (S (BASENP (NNP Brookings)) (VP (VP (VBD drew) (BASENP (NNS conclusions))) (PP (IN from) (NP (BASENP (JJ statistical) (NNS data)) (SBAR (WHNP (WDT that)) (S (VP (MD could) (VP (VB be) (VP (VP (VBN influenced) (PP (IN by) (NP (BASENP (DT a) (NN variety)) (PP (IN of) (BASENP (NNS factors)))))) (PRN (LRB -LRB-) (SBAR (IN since) (S (NP (EX there)) (VP (VBD was) (BASENP (DT no) (JJ clinical) (NN control))))) (RRB -RRB-)))))))))))) (PERIOD .))