The purpose of this study was to investigate when collecting and classifying personality traits adjectives of Korea and America, is Korea classified as collectivistic culture and America classified as individualistic culture? This study also tried to find out what implications do these culture differences between Korea and America have for introducing American psychology and for importing psychological instruments to Korea? For these purposes, 473 Korean personality traits adjectives and 300 American personality traits adjectives were extracted and then asked Korean evaluators and American evaluators to classify these vocabularies in terms of intrapersonal vocabulary-interpersonal vocabulary and a degree of likableness or dislikableness. Results of analysis revealed that Korean language had higher percentage of intrapersonal vocabularies than interpersonal vocabularies and from Korean people"s perspective, more than about 26% among vocabularies which were classified as interpersonal vocabularies could be ev aluated as intrapersonal or neutral vocabularies.