As a multicultural (Haitian American) and multilingual psychologist (Spanish, French, and Haitian Creole), her research is reflective of her background and interests. Her current research projects focus on developing culturally effective mental health intervention for people of color, with a specific focus on immigrant children, adolescents, and families. In addition, she conducts research on social support networks of Caribbean population with a specific focus on Haitians; spirituality and adolescents; and social support and mental health of Blacks. She has published books, many articles, and book chapters and delivered numerous invited presentations at national and international conferences in the areas of women issues, depression and cultural interventions, social support networks of ethnic minorities, and spirituality. Most recently, she co-edited the book Contemporary Parenting: A Global Perspective.
Dr. Nicolas is an active member of the American Psychological Association, having served on divisional committees for Division 12, 17, 35, and 45. In addition, she has been a member of several APA committees including the Committee on International Relations in Psychology, Strategic Planning Committee, and the Committee on Early Career Psychologists. In addition to APA, she has been an active member of the Caribbean Studies Association, the Haitian Studies Association, and the Caribbean Alliance of National Psychological Associations (CANPA). She served as president of the Haitian Studies Association, the Psychology of Black Women of Division 35, and the Section of Ethnic Minorities of Division 12. Currently she serves as the Secretary General of CANPA.