A study was undertaken to determine some of the methodological considerations that can lead to a more reliable and valid end product in intercultural experimental research. The subjects were bilingual native Japanese college students in Tokyo. The project included a pretest, treatment, and posttest. The pretest determined the attitude of the subjects on a number of attitude items. Two months later, the subjects were randomly assigned to a role playing condition and placed into dyads where an active participant argued a counterattitudinal position suggesting that all Japanese be required to learn English. Immediately following the treatment, a posttest was administered to measure the attitude change. Three conditions determined whether the methodology used was appropriate: language problems, experimenter bias, and intercultural differences. By examining the possibilities of these conditions occuring, their effect was lessened, and the experimental research was strengthened. It was concluded that precautions must always be taken to ensure that methodological and practical considerations have been adhered to. (TS)