The article reports the results of three studies designed to extend the psychometric analyses of cultural intelligence (CQ) and to examine its utility in the prediction of cross-cultural adaptation. The first study supported the proposed four-factor (Cognitive, Meta-cognitive, Motivational, and Behavioral) structure of CQ in a large sample of international students ( N = 346). The second study ( N = 118) revealed a strong correlation (r = .82) between CQ and emotional intelligence and failed to support the incremental validity of CQ scores in the prediction of psychological, sociocultural, and academic adaptation in international students. The final study ( N = 102) established discriminant validity ( r = .04) between scores of CQ and a test of general cognitive ability (Raven's Advanced Progressive Matrices) and convergent validity across scores of the CQ and Multicultural Personality Questionnaire subscales; however, CQ scores did not demonstrate additional incremental validity in the prediction of adaptive outcomes. The results are discussed in relation to issues arising from the use of self-report measures for the assessment of cultural intelligence and the utility of the CQ measure in international and intercultural settings.