Internal and External validity evidence for Level of Personality Functioning Scale – Brief Form 2.0

Abstract

This study aimed was to investigate the internal and external evidence validity of LPFS-BF.2.0. 774 Brazilian adults, aged from 18 to 73 years, participated. The participants answered the following instruments: LPFS-BF.2.0., SAPAS, WHO-5, IDCP-SV, BFI-2 S. Data were analyzed using exploratory factor and factor congruence analysis, internal consistency, correlation with external measures, and mean comparison between groups. The internal structure found was similar to the one reported in previous studies. Results suggested validity evidence based on internal structure across adequate fit indices and factor congruence. This study›s findings also provide validity evidence based on external relations. The LPFS-BF 2.0 presented negative correlations with well-being and positive correlations with other personality measures. Mean comparison revealed this test capacity for discriminating people with poor mental health from people with good mental health.