The Berry model, well known in cross-cultural psychology, categorizes acculturation patterns into four types based on yes-no questions regarding the retention of traditional culture and the relationship with the larger society. Business administration and various other research fields have attempted to use the model due to its simple clarity. However, doubts exist regarding (i) the feasibility of deculturation (marginalization); (ii) the validity of a label "integration," and (iii) the mutual independence of the four cells. In fact, these doubts stem from the process of formulation of the Berry model. Berry originally categorized 24 question items used in the surveys of individuals belonging to minority populations according to the three labels of assimilation, integration, and rejection. Moreover, Berry used yes-no questions to summarize the characteristics of these labels and added a fourth label, that is, deculturation (marginalization). This format became the prototype for the Berry model.