<p>Objective: The main objective of the present research was to examine A Comparison between Personality Factors in Individuals Inflicted with Slow Pace Down Syndrome with and without Alzheimer Disease in Tehran and Baku.</p>
<p>Methodology: The present research is of “Causal – Comparative” type. The population under the study consists of Individuals inflicted with Down syndrome with or without Alzheimer Disease who are above 40 years old. The research was a goal-oriented one, and 40 Individuals inflicted with Down Syndrome in Baku (20 with Alzheimer Disease and 20 without Alzheimer Disease), and 40 Individuals inflicted with Down Syndrome in Iran (20 with Alzheimer Disease and 20 without Alzheimer Disease) were chosen as the statistical sample. For compiling required information in this research, the questionnaire of NEO – FFI Personality Factors which has been made by Casta and Mac Kera, 1992 was used and the final result of the questionnaire was 0.77. Finding: Based on results of the research we can say that the Personality Factors in Individuals Inflicted with Slow Pace Down Syndrome with and without Alzheimer Disease in Tehran and Baku is meaningful at 0.01 (F=20.23, p&lt;0.01). In other words, there is a meaningful difference between two groups’ points. Then, we can conclude that the Personality Factors in Individuals Inflicted with Slow Pace Down Syndrome with and without Alzheimer Disease in Tehran and Baku are different. And considering the table of means, we can say that the Personality Factors, neuroticism, conscience, flexibility, receptiveness in Baku is more than Iran.</p>