Reports an error in “The Development and Psychometric Evaluation of the Trans Discrimination Scale: TDS-21” by Laurel B. Watson, Luke R. Allen, Mirella J. Flores, Christine Serpe and Michelle Farrell (Journal of Counseling Psychology, Advanced Online Publication, Jul 23, 2018, np). In the article “The Development and Psychometric Evaluation of the Trans Discrimination Scale: TDS-21” by Laurel B. Watson, Luke R. Allen, Mirella J. Flores, Christine Serpe, and Michelle Farrell (Journal of Counseling Psychology, 2018, Advance online publication. http://dx.doi.org/10 .1037/cou0000301), there were two errors in the Methods section of the article. In Study 1, Participants paragraph of The Development and Psychometric Evaluation of the Trans Discrimination Scale: TDS-21 for the Methods section, the gender listed at birth was incorrect in the following sentence, The majority of participants in this study identified as trans women and along a trans feminine spectrum, were assigned male at birth, White, had attained some college but no degree, and were employed full time. The correct gender assigned at birth was predominantly female. In addition, the gender coding procedures was incorrectly described. Specifically, those who identified as FAAB and AFAB were actually coded as trans men or along a transmasculine spectrum, whereas those who identified as MAAB and AMAB were coded as trans women and along a trans feminine perspective. In Study 3, Participants paragraph of The Development and Psychometric Evaluation of the Trans Discrimination Scale: TDS-21 for the Methods section, the gender identity listed in the following sentence was incorrect, The majority of participants identified as trans women and along the trans feminine spectrum, were assigned female at birth, White, had attained some college but no degree, and were students. Rather, participants primarily identified as non-binary trans. (The following abstract of the original article appeared in record 2018-35350-001.) To date, researchers assessing the role of discrimination in trans peoples’ lives have relied upon measures that were developed and normed on LGB populations, culled specific items from large-scale survey data, or used more generalized measures of discrimination that do not specifically assess the unique forms of discrimination that trans people may encounter. Thus, the purpose of this three-part study was to develop and provide psychometric support for a measure of trans peoples’ discrimination. In Study 1, a five-factor model emerged, which included: Microaggressions and Harassment, Restricted Career and Work Opportunities, Maltreatment in Health Care Settings, Harassment by Law Enforcement, and Bullying and Harassment in Educational Settings. Internal consistency estimates for subscale and total scale scores ranged from acceptable to excellent. Results from Study 2 revealed that a bifactor model provided the best fit to the data, revealing that the scale is essentially unidimensional. In addition, convergent and concurrent validity was supported, demonstrating significant positive correlations with another measure of trans discrimination, internalized transphobia, nondisclosure, negative expectations for the future, psychological distress, and perceived stress. In Study 3, results revealed excellent test–retest reliability up to a three-week period. Collectively, results suggested that the Transgender Discrimination Scale-21 (TDS-21) is a psychometrically sound measure that may be used to advance research on the role of discrimination in trans peoples’ lives. (PsycINFO Database Record (c) 2019 APA, all rights reserved)