Abstract
This Research aimed to investigate the level of significance of self-efficacy (effectiveness of self), psychological peace, and anxiety of death among Arab adults, according to nationality and gender, in addition to exploring the differences in these three variables. The researcher prepared three measures that were applied to a sample of (382) Arab adults from (Saudi Arabia, Yemen, Egypt, Syria and Sudan). The most important results showed that there is a level of positive statistical significance for each of the effectiveness of self, psychological peace and negative statistical significance for anxiety of death. Also, there was a level of significant difference for the three variables according to nationality majority of which was the Saudi nationality. There was no significance difference for the three variables according to gender (male-female). The results concluded that the relationship among the three variables varied and it has appeared that there is no statistically significant relationship between self-efficacy and psychological peace except for the relationship between self-efficacy and death anxiety which is negative, whereas there was no statistically significant correlation between psychological peace and death anxiety