The Effects of 8th Graders’ Attitude, Interest, and Math Self-Concept on their Math Performance in TIMSS 2003-2015:
A Trend Study*
M. Ja’fari**
A.R. Kiamanesh, Ph.D.***
A. Karimi, Ph.D.****
To determine the effects of self-concept, attitude, and interest on the math performance of 21082 eight graders participating in four TIMSS studies from 2003-2015, and the trend of these effects...
