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This study aimed to validate a short relationship satisfaction scale (RAS) in a sample of young people and adults in the Lima metropolitan area. There were a total of 806 participants aged between 18 and 30 years: 622 females (77.20%) and 184 males (22.80%). Every participant was currently in a love relationship of a minimum of three months. The methodologies of Confirmatory Factor Analysis (CFA) and Item Response Theory (IRT) were combined to determine the structure and assess the reliability of the instrument. The Omega coefficient (ω) was used from CFA, while the test information function and empirical reliability ( r xx ) were used from IRT. The results showed that the RAS could be interpreted as a one-dimensional scale when eliminating the items 4-7 and joining the items 1-2. This model shows high goodness of fit from a CFA-perspective. A similar situation occurs in IRT, except that error covariance is not considered. Nevertheless, assuming the elimination of items 4-7 is still a good option. The reliability in both CFA (ω = .838) and IRT ( r xx  = .862) was satisfactory. The evidence of relationship with other variable showed inverse and big relationship with violent spells of tension and difficulty.

The Satisfaction with Family Life Scale (SWFLS) is a measure of a person's satisfaction with their family life as a whole that has been used in different cultural contexts. However, its internal structure and factorial invariance have not been investigated simultaneously in culturally different samples from America and Europe. The current study aims to evaluate the internal structure and factorial invariance of the SWLFS in adolescents from Peru and Portugal, through a multi-group confirmatory factor analysis. The study was conducted on 439 adolescents from Peru ( N  = 232; Age average = 15.50, S.D. = 0.65) and Portugal ( N  = 207; Age average = 16.16, S.D. = 0.81). First, the confirmatory factorial analysis for each group was carried out, followed by the multi-group confirmatory factorial analyses. Results indicated that the one-factor structure of the SWLFS presents a good adjustment to the data, in addition to an adequate internal consistency. Moreover, the presence of configural, metric, scalar and strict invariance is demonstrated across culturally different samples. The SWFLS is a brief and valid measure of satisfaction with family life that is useful for intercultural comparisons between samples of adolescents from Peru and Portugal.

Aim: Satisfaction with life is a measure of protection in older adults. There lies the importance of providing quality instruments. The aim of the study was to evaluate the invariance of the life satisfaction scale (SWLS) in two samples of older adults in Spain and Peru., Method: The participants were 857 older adults in Spain (mean age=68.23 years, SD=5.93) and 336 older adults in Peru (average age=72.42, SD=7.07). All multi-group confirmatory factor analyzes were estimated in Mplus 8.0., Results: The results indicate the presence of a strict invariance of the one-dimensional structure of the SWLS in samples of older adults in Spain and Peru, which allows for meaningful comparisons of latent means and covariances. Comparison of latent means showed small differences in the construct between the cultural groups., Conclusions: The SWLS is a valid instrument for intercultural comparisons between Spanish and Peruvian population. The measurement invariance assessment contributes to a better understanding of life satisfaction in populations from different cultural contexts., (Copyright © 2019 SEGG. Publicado por Elsevier España, S.L.U. All rights reserved.)