JPSY_V7_N1_RP3 An Investigation on the Impact of the Socio–Psychological Effects of Teacher Disposition on the Academic Performance of Students in a Diversely Populated Elementary School James E. Osler II Stacy A. Russell Journal on Educational Psychology 2230 – 7141 7 1 23 33 Achievement, Disposition, Education Science, Eduscience, Impact, Investigation, Socio–Psychological, Teacher Dispositions Index, Qualitative Inquiry, Teacher, Trichotomy, Tri–Squared The purpose of this research was to examine how teacher disposition affects student academic performance through the validity and reliability of a quantitative inventory instrument: The Teacher Dispositions Index [TDI] that measures the dispositions of effective teachers specified by the Interstate New Teacher Assessment and Support Consortium. May - July 2013 Copyright © 2013 i-manager publications. All rights reserved. i-manager Publications http://www.imanagerpublications.com/Article.aspx?ArticleId=2347