This study investigated the perceptions and attitudes students have regarding their decision to participate or not as witnesses in a southwest United States private university gender-based violence adjudication process. The study also investigated whether there was a relationship between students' decisions to participate and their gender, age, grade point average (GPA), classification, on- or off-campus housing arrangements, athletic participation, or Greek affiliation. Using a multi-method research design, the researcher collected qualitative data pertaining to the perceptions and attitudes of students regarding their decision to participate and quantitative data pertaining to the relationship between participation and student demographics. The seven major themes the researcher identified from the survey responses of students who chose to participate as witnesses included: (a) "duty to inform," (b) "justice," (c) "support my friend," (d) "fear," (e) "seriousness and severity of the misconduct," (f) "Title IX system is biased," and (g) "if…I would not have participated…" The four major themes the researcher identified from the survey responses of students who chose not to participate as witnesses included: (a) "didn't know enough," (b) "didn't have time," (c) "emotional," and (d) "encouraged." The researcher used logistic regression and chi-square tests to investigate the relationship between participation and the variables of gender, age, ethnicity, grade point average (GPA), classification, on- or off-campus housing arrangements, athletic participation, and Greek affiliation. Witnesses and non-witnesses shared many factors that impacted their perceptions and attitudes regarding deciding whether to participate or not as witnesses in an adjudication process. Most of their perceptions and attitudes were connected to the information they believed they could contribute and whether the situation warranted them participating in an adjudication process. In terms of the relationship between the demographics and students' decisions to participate, there was no statistically significant relationship between gender, age, GPA, on- or off-campus housing arrangements, athletic participation, and Greek affiliation and students' decision to participate. However, the individual predictor of living on-or-off campus was statistically significant indicating those who live on campus are more likely to participate as witnesses than those who live off campus. Based on the study findings, it was recommended IHEs assess and address college students' acceptance of rape myths, educate students on their Title IX policy and adjudication process, and create and thoroughly explain a policy on retaliation. [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.]