Hollingshead (1965). In addition, longitudinal research is the ideal way to study developmental issues. Longitudinal research could examine ethnic identity development across adolescence. Also, the formation of mentoring relationships, their quality and duration as well as any influence they have on the adolescent's well-being could be studied over time. Continued research related to the presence of natural mentors is definitely needed. This area would benefit from qualitative research that explores the nature and quality of mentoring relationships. Qualitative research would also improve the construct validity of measures that could benefit from further development and validation. Also, a large portion of the adolescents categorized their mentors as "other." In order to assess who these mentors are, open-ended interview or survey items are necessary. Philip and Hendry (2002) interviewed adolescents in Scotland and found intriguing results in response to questions about natural mentors. The adolescents indicated that individual peers (or best friends), peer groups, and adult-teen groups were all contexts in which they obtained mentoring support. More research of this type is needed. Alternative or supplemental measures of ethnic identity could be utilized in future studies. For example, the Hispanic participants did not score significantly differently from the European American participants. However, Spanish language usage and level of acculturation are aspects of ethnic identity that were not assessed. These specific issues are not part of the MEIM, which is a generic measure that can be utilized for all ethnic groups. More specific measures may be needed for certain subgroups. It is possible that these factors are related to mental health. Also population divisions may even have to be more specific (e.g., Cuban American) if the intent is to develop programs or to intervene with specific sub-populations.