abstract: The purpose of this study was to investigate the effects of static pedagogical agents (included and excluded) and gamification practice (included and excluded) on vocabulary acquisition and perceptions of cognitive load by junior high students who studied Navajo language via computer-based instructional program. A total of 153 students attending a junior high school in the southwestern United States were the participants for this study. Prior to the beginning of the study, students were randomly assigned to one of four treatment groups who used a Navajo language computer-based program that contained a combination of static pedagogical agent (included and excluded) and gamification practice (included and excluded). There were two criterion measures in this study, a vocabulary acquisition posttest and a survey designed both to measure students’ attitudes toward the program and to measure cognitive load. Anecdotal observations of students’ interactions were also examined. Results indicated that there were no significant differences in posttest scores among treatment conditions; students were, however, generally successful in learning the Navajo vocabulary terms. Participants also reported positive attitudes toward the Navajo language content and gamification practice and expressed a desire to see additional content and games during activities of this type. These findings provide evidence of the impact that computer-based training may have in teaching students an indigenous second language. Furthermore, students seem to enjoy this type of language learning program. Many also indicated that, while static agent was not mentioned, gamification practice may enhance students’ attitudes in such instruction and is an area for future research. Language learning programs could include a variety of gamification practice activities to assist student to learn new vocabulary. Further research is needed to study motivation and cognitive load in Navajo language computer-based training. / Dissertation/Thesis / Doctoral Dissertation Educational Technology 2018