The major aim of this research was to investigate psychometric properties of "NEO-Five Factor Inventory" ((NEO-FFI)). To this aim, after doing preliminary stages and resolving possible problems, the exploration of this scale was conducted in two studies: in the first study, in order to assess reliability using internal consistency, 604 undergraduate students of Tehran, Amirkabir and Shahed Universities (334=female and 270=male) with average age of 21.8 (sd=2.49) were selected by available sampling method. Students completed (NEO-FFI). Results of this study indicated that Neuroticism and Conscientiousness had acceptable internal consistency in all subjects (higher than 0.70). Of course, Cronbach Alfa of Extroversion and Agreeableness were higher than suggested level for group comparisons (higher than 0.5). Therefore, only openness lacked acceptable internal consistency. In the second study, in order to assess construct validity of (NEO-FFI), Pearson's product-moment correlation was calculated for five factors of (NEO-FFI) and 9 facets of "Symptom Checklist-90- Revised" (SCL-90-R). Results of these analyses indicated that Neuroticism with all facets of SCL-90-R, Conscientiousness with all facets of SCL-90-R with the exception of paranoid thinking (Bonferroni correction not considered) and obsessive-compulsive facets (Bonferroni correction considered), Agreeableness and Extroversion with 3 and 7 facets of SCL-90-R (Bonferroni correction considered) had significant correlation. Openness did not show any significant correlation with facets of SCL-90-R. Besides, among these factors, only the relationships of Neuroticism with facets of SCL-90-R was a significant positive correlation and the remaining factors had not significant correlation or had significant negative correlation with facets of SCL-90-R. In conclusion, results of this study with respect to literature review about investigating psychometric properties of (NEO-FFI) in non-English cultures suggest need to investigate factor structure of this in Iranian population.

Background: Personality is a general and complex concept which has resistant effectes on marital relationship. Some of personality traits and mental disorders will increase conflictions and tension between couples so that these confliction may have significant effects on family’s unsuccessfulness and instability also they may threat marital durability and stability. The aim of this study is to compare personality specifications between conflicting couples and normal couples regarding to the five factors inventory.Methods: The sampling community includes 53 conflicting couples and 53 normal couples form Esfahan city who were selected by available sampling method. The measurement tool is Casta and Mac cery’s Neo five factors inventory (240 questions). For analyzing the data we use Spss 16 and Manova at significant level p<0.05.Findings: The results of this study show notable differences in conciseness (C) and extroversion (E) and Neuroticism (N), but there is not differences in Agreeableness (A) and O at significant level P<.05.Conclusion: According to this study, it can be concluded that personality specifications such as neuroticism and extroversion and conciseness are effective on confliction between couples.

The main purpose of this research was to study the hierarchical structure of personality by using the NEO-Five Factor Inventory ((NEO-FFI)). This research Was a descriptive-correlational. The statistical population included Isfahanian couples. From this population, 522 available persons (261couples) were selected. The (NEO-FFI) was used for collecting the data. Confirmatory Factor Analysis was used for studying the factor structure of the (NEO-FFI) by using Amos18. The results showed that the (NEO-FFI) has a great reliability and validity. The studying of the measuring model revealed that the Big Five Factors of personality went to the Big Two and then to the Big One. The first second order factor, Stability, includes Conscientiousness, Emotional Stability, and Agreeableness. Another second order factor, Plasticity, consists of Openness and Extraversion. GFP explained 61% of the variance of stability and 94% of the variance of plasticity. GFP occupies the top of the hierarchical structure of personality.

Objectives: In view of the existing methodological drawbacks in the previous investigations of NEO-Personality Inventory-Revised, the present study aimed at reinvestigating the construct validity of this inventory in Iran.Method: 334 students 231 female and 98 male, 5 not specified) with a mean age of 23.1 were selected via convenience sampling from Tehran, Elm-o-Farhang and Shahid Beheshti Universities, and completed NEO-Personality Inventory-Revised. Inclined rotation and parallel analysis was used for exploratory and confirmatory factor analysis.Results: Exploratory factor analysis resulted in the extraction of five factors, which altogether accounted for 59.25 percent of the total variance of the data. As a result of exploratory factor analysis, a noticeable number of cross-loads and wrongly loaded subscales were observed. Confirmatory factor analysis also resulted in weak to moderate fit indexes.Conclusion: Considering the results of the present study and with regard to the medium and weak alpha coefficients in the Garousi Farshi study, the primary applicability of this questionnaire in the Iranian culture is questionable. It seems that factor analysis at the level of characteristics could be helpful.

The background and purpose: The current research has been conducted with the aim of how to improve the psychological resilience of the soldiers of operational units based on the NEO five-factor personality inventory. Method: This research, which is descriptive and causal, has been carried out using a mixed method. For this purpose, the data of the qualitative part was collected by studying documents and semi-structured interviews with experts and the data of the qualitative part were collected with research-made questionnaire of 60 questions. The expert’s community is a group of officials and professors of educational and universities centers and the statistical community is The Staff of Operational Units of one of the armed forces with at least a diploma. The expert sample was selected the purposeful method of judgment and up to the theoretical saturation stage in the number of 14 people. Also, the statistical sample size was calculated by Cochran’s formula to the number of 172 people and the questionnaire was distributed among them by stratified random method Qualitative section data with analysis method. Thematic and quantitative data were analyzed with by confirmatory factor analysis. Findings: The findings showed that through the components of the five-factor personality characteristics of NEO such as reducing anxiety, reducing anger and resentment, reducing depression, positive, thinking, daring, being friendly, being creative intelligent, high flexibility, empathy, trust altruism self-efficacy,

The purpose of this study was to investigate the Structural equation modelling of couples’ satisfaction based on five factor neo personality components by the mediating role of mother-child Relationship. This research was applied in terms of purpose and correlational in terms of descriptive method. The statistical population included sixth grade students of boys and girls primary schools in Shiraz city in 2017 along with their mothers that among them, 260 people were selected as a sample by cluster random method from the nine educational districts of Shiraz city. In order to collect data from NEO Personality test (1992), ENRICH Couple Scale (1989) and Fine, Moreland and Schwebel’s (1983) parent-child relationship were used. Data analysis was performed by Pearson correlation and structural equation modelling. Findings showed significant negative correlation between neuroticism and couples’ satisfaction but positive correlation with extraversion, openness experience, agreeableness and conscientiousness. Also, the mother-child relationship variable predicts couples ‘satisfaction in a positive direction. Personality traits, as the preconceived forms of engagement by individuals in marital relationships affect the mediating structures including the mother child relationship. Therefore, couples’ satisfaction affected by intrapersonal factors in particular personality traits. The results also revealed that personality trait components with mediating role of mother-child relationship have the capacity to determine marital satisfaction (P≤ 0/01).

Purpose of the present study was to comparison study Personality characteristics among opium, heroin drug dependency, smoking and non-smoking participants in Marvdasht. In this retrospective study, 50 opioid dependent, 50 heroine drug dependency participants were selected by purposive method and,  50smoking and 50 non-smoking individuals, who were matched on the basis of age and education with drug dependency participants were selected by random sampling method, and assessed using the questionnaire of the Neo personality five agents. The five hypotheses were tested by multivariate analysis of variance. Results showed that there were significant differences between four groups with respect to personality types (neuroticism, extroversion, openness to experience, conscientiousness), except for agreeableness. These findings indicated that personality types are different among four groups (non-smoking, smoking ,opium-heroine drug dependency).