Racial Differences in Associations of Cognitive Health Status With Happiness, Helplessness, and Hopelessness Among Older Adults: An Exploratory Study oleh Emre Umucu, Beatrice Lee, Mary Wyman, Mary Wyman, Mary Wyman, Diane Carol Gooding, Carol Ann Van Hulle, Carol Ann Van Hulle, Adrienne Johnson, Carola A. Ferrer Simo, Carola A. Ferrer Simo, Fabu Carter, Hector Salazar, Taryn T. James, Shenikqua Bouges, Nicholas H. Lambrou, Sterling C. Johnson, Sterling C. Johnson, Sterling C. Johnson, Sanjay Asthana, Sanjay Asthana, Sanjay Asthana, Sanjay Asthana, Carey E. Gleason, Carey E. Gleason, Carey E. Gleason