Abstract: Background: Studies have this reported the presence of death anxiety, ranging from near-death experiences to physically ill people, to a simple thought about death, as well as when it is associated with states of loneliness. The Templer's Death Anxiety Scale (DAS), based on Eysenk's incubation theory, has been adapted and validated in different contexts and is still insufficient in countries such as Peru. This study aimed to determine the psychometric properties of the DAS, its internal structure, and factorial invariance. Methods: An online scale was used in 1248 Peruvians aged between 18 and 70 years (M= 27.37, SD= 11.29) from all regions. DAS was validated using exploratory factor analysis (EFA), confirmatory factor analysis (CFA), convergent validity, measurement invariance, and internal consistency (reliability). Results: Psychometric properties were found with adequate values in its structure and validity based on the internal structure through exploratory factor analysis, where it was found that the components of the scale are interrelated and the data matrix is factorizable. model of three specific factors and a general factor is presented, which is consistent with the theory and has practical utility, revealing adequate statistical values that reflect acceptable levels of reliability. Finally, there was fairness according to sex and age group of the scale by means of factorial invariance analysis. Conclusions: Our results indicate adequate psychometric properties and facilitate a better data collection process for future research. Keywords: death anxiety, validity, reliability, fairness/equity, adults.

Este material forma parte del artículo: "Death anxiety scale (DAS): internal Structure and factorial invariance in Peruvian adults", afiliación del primer autor: Universidad César Vallejo.