Choe, Mun-Hong. (2022). Second culture acquisition and language development: Cultural sensitivity as an individual difference factor. The Linguistic Association of Korea Journal, 30(4), 145-167. This paper constitutes an initial part of the research agenda that aims to explore the relationship between individuals’ multicultural sensitivity and their acquisition of a second language (L2). In order to lay the groundwork for a systematic inquiry into this complex problem, the present study first reviews previous works on theoretical and empirical validation of the construct of cultural sensitivity. The affective, cognitive, and behavioral correlates of cultural sensitivity that have been identified and discussed in the literature are recapitulated from a perspective of L2 research. Secondly, drawing on a pool of extant instruments to measure individuals’ cultural sensitivity, we develop an alternative scale that better fits the goal of subsequent research efforts to investigate the role of cultural sensitivity in L2 acquisition. Lastly, we put forward some research questions that can be tackled effectively by means of the instrument developed here in the context of learning and teaching English as a foreign language.