The purpose of this study was to investigate the relationship between personality traits and effective written expression. The study participants (N = 76) were developing third and fourth-grade students. They produced three short narrative writing samples and responded to questions on a personality inventory. Written expression was measured using Total Words Written (TWW), Correct Writing Sequences (CWS), and Flesch Reading Ease (GRE) scores; while the personality traits were measured using four scales of the Five-Factor Model (Openness to Experiences, Extraversion, Conscientiousness, and Emotion Regulation). Multiple regression analyses using the personality traits as the predictors did not find a model that could statistically significantly predict the written expression variables. Pearson's correlation analyses showed that TWW had non-significant correlations with Extraversion (r = 0.112, p = 0.337), Openness to Experience (r = 0.115, p = 0.324), and Conscientiousness (r = 0.186, p = 0.110). CWS had weak correlation with Openness to Experience (r = 0.191, p = 0.100) and Conscientiousness (r = 0.222, p = 0.056). FRE had weak negative correlations with Extraversion (r = -0.091, p = 0.435) and Openness to Experience (r = -0.151, p = 0.195). [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://bibliotheek.ehb.be:2222/en-US/products/dissertations/individuals.shtml.]