Developmental Psychology (2015) - Comment
pubmed: 26436872  doi: 10.1037/a0039740  issn: 1939-0599  issn: 0012-1649 

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Claire E. Cameron, Laura L. Brock, Bridget E. Hatfield, Elizabeth A. Cottone, Elise Rubinstein, Jennifer LoCasale-Crouch, David W. Grissmer