1. BYU Salt Lake Center, Salt Lake City, UT, USA;
2. Educational Research & Evaluation, Instructional Psychology & Technology Department, David O. McKay School of Education, Brigham Young University, Provo, UT, USA;
3. Information Systems Department, Brigham Young University, Provo, UT, USA;
4. Instructional Psychology & Technology Program, Brigham Young University, Provo, UT, USA