Smartphones and their impact on academic success was chosen as the research topic for this dissertation. This was chosen because smartphones have become very popular tools for many people, especially for students in an educational setting. Further, the use of these devices and others, such as laptops and tablets, has aided students in boosting their learning potential. However, many students turn to their devices for off-task activities, and this can be very problematic as it distracts from the learning objectives. This study aimed to fill in some of the gaps in the literature by using the variables of smartphone addiction risk, technology-related anxiety, and self-control to understand how they impact academic performance in the form of GPA. The research questions used for this study were developed to understand the relationships among the variables, determine if predictions could be made from the influence of predictor variables on the outcome variable, and identify which predictor variable predicted GPA scores the best. To do this, a quantitative, nonexperimental approach was used by implementing a series of self-report instruments. The population of interest was college level students as young as 18. Using Spearman's correlation, multiple linear regression, and backward stepwise regression, each research question was addressed, assessed and answered based on the data collected. A small positive correlation was observed between self-control and GPA and a moderate positive correlation was observed between technology-related anxiety and smartphone addiction risk. Some support was found for each research question with self-control emerging as the strongest predictor of GPA scores. Implications and suggestions based on the findings will help future studies and professionals understand how these factors impact academic success. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://www.proquest.com.bibliotheek.ehb.be/en-US/products/dissertations/individuals.shtml.]