A Meta-Analysis on the Research Related to the Meaning Therapy Approach on Life Expectancy

Aim: The purpose of this research was to determine the effectiveness of meaning therapy approach on life expectancy. Methods: This research determined the effect size of the meaning therapy approach by using the meta-analysis technique and by integrating the results of different research. The statistical population included all the articles in the field of the effectiveness of the meaning therapy approach on life expectancy, which were 15, and a total of 12 methodologically acceptable studies were selected and meta-analysis was performed on them. The sources of data search included the scientific information database, the Noor specialized journals database, the Iran Journals Information Bank, and the comprehensive humanities portal. Data analysis and effect size calculation were done using CMA3 software and g-index. Findings: The results of this meta-analysis showed that the effect of meaning therapy approach on life expectancy is (1.76) (P<0.001), which is evaluated as a large effect size according to Cohen's table. Conclusion: It seems that the meaning therapy approach can be used as a suitable method to improve life expectancy in medical and educational centers.