“… been down so long …”: Perpetual vs. intermittent inferiority and the Köhler group motivation gain in exercise groups

Group Dynamics Theory Research and Practice (2013) - Comment
doi: 10.1037/a0031588 issn: 1930-7802 issn: 1089-2699

Norbert L. Kerr, Samuel T. Forlenza, Brandon C. Irwin, Deborah L. Feltz