Research Interests: a. Personality assessment. b. Personality structure. c. Personality language and taxonomy. d. Cross-cultural comparison in personality. e. Death anxiety. f. Obsessive compulsive disorder. g. Childhood depression. h. Optimism - pessimism. Membership: a. The Egyptian Association of Psychological Studies. b. American Psychological Association. c. New York Academy of Sciences. d. American Association for the Advancement of Sciences. e.American Sleep Disorders Association.