There are two general goals that personality researchers seek to accomplish. The first goal is to define domains that comprise the thousands of personal characteristics that make a person unique. And the second is to examine the generalizability of dimensions across cultures and languages, that is, to observe whether personality domains are universal or culture-specific. Following the steps of personality psychologists the first goal of this dissertation was to define dimensions of personality of Americans and Mexicans, and the second was to observe if dimensions were equivalent or unique across these two cultures. Typically personality researchers, in order to identify the most relevant aspects of human personality, have turned to a questionnaire method whereby people rate themselves along dimensions of traits most often described in natural language. These trait terms are derived from various dictionaries within the researchers' culture. Multiple ratings are then factor analyzed yielding a smaller group of broad traits that then serve to define the culture's primary personality dimensions. In this investigation, personality terms were culled from open-ended personality descriptions. Relying on a new text analytic procedure called the meaning extraction method, it was possible to define dimensions of personality in Americans and Mexicans. The factoranalytically derived results showed that there were seven relevant dimensions of personality for Americans and six dimensions for Mexicans. Using qualitative and quantitative analyses it was possible to observe which dimensions were equivalent and which dimensions were unique to each culture. Specifically, for both Americans and Mexicans, the most important dimensions were Sociability, Values, Hobbies/Activities, and Emotionality. Three dimensions were unique to Americans (i.e., Fun, Existentialism, and College Experience), and two for the Mexicans (Relationships and Simpatía). Other analyses were done to explore the universality and uniqueness of the dimensions. For example, dimensions were correlated with self-reports that measure dimensions wellestablished by personality researchers. The challenge of establishing dimensions across cultures and languages are discussed, along with the limitations of the approach.

Although Latinos are the largest minority group in the country, research examining how different psychological and cultural variables affect Latino individuals' wellbeing is disproportionately developed and cross-cultural comparison studies are particularly scarce. To address these issues, this dissertation research examined cross-cultural adult attachment-social self-efficacy-psychosocial wellbeing conceptual mediational model while investigating the moderator effects of country membership and familismo on the proposed mediational model using a cross-cultural sample of Mexican and Mexican-American university students. A total of 595 participants, including 360 Mexican students from Mexico and 235 Mexican-American students from the United States completed the research questionnaires. Results indicated that social self-efficacy was a significant mediator for the effects of insecure attachment on life satisfaction and conflict resolution in both cultural groups and for the links between attachment insecurity and depressive symptoms in the Mexican-American group. Additionally, moderated mediation analyses showed that country membership was a significant moderator for the links between attachment avoidance and social self-efficacy when life satisfaction, conflict resolution style, and depressive symptoms were the dependent variables, as well as for the direct link between attachment anxiety and physical health symptoms. Familismo was also found to be a significant moderator for the direct effects of attachment anxiety on physical health symptoms and life satisfaction in both groups. Findings are discussed from the attachment and cross-cultural perspectives. Counseling implications, limitations, and future research directions are offered.