According to Caldwell and Bradley, the developers of the HOME (Home Observation Measurement for Environment) Inventory, this measurement is one the worldwide mostly used instruments to assess the developmental context of infants and toddlers. Numerous studies, including those of Bradley and colleagues, have been concerned with the lack of criterion validity of the HOME Inventory in ethnic and minority groups in the USA. Referring to the predictive criterion validity it was found in a comparative study with Anglo-American, Afro-American and Mexican-American samples that the relationship between HOME scores and the cognitive developmental scores of the children was stronger in the Anglo-American sample than in the two other groups. It was assumed that a cultural bias underlying the item construction, and with this a lack of content validity, caused these criterion validity differences. Therefore Bradley and colleagues proposed to develop supplement items to the HOME Scale in order to detect culture specific aspects in the home environment of minority children. Following this suggestion the author composed culture specific supplement items for the assessment of the developmental context of Turkish-German toddlers in Germany with the aim to increase the criterion validity of the HOME by enhancing its content validity for this special group. In a validation study the original HOME items and the supplement items were applied to 36 Turkish immigrant families and 35 German families with infants at the age of twelve months. The results of the study suggest that an addition of supplement items can increase the criterion validity of the HOME Scale slightly but that a criterion oriented item selection of the original items is a more successful approach.