Open AccessEquivalent short forms of the Situational Feature Recognition Test 2: Psychometric properties and analysis of interform equivalence and test–retest reliability
Author(s) -
GómezGastiasoro Ainara,
Peña Javier,
ZubiaurreElorza Leire,
IbarretxeBilbao Naroa,
Ojeda Natalia
Publication year - 2019
Publication title -
international journal of methods in psychiatric research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.275
H-Index - 73
eISSN - 1557-0657
pISSN - 1049-8931
DOI - 10.1002/mpr.1802
Subject(s) - cronbach's alpha , psychology , wilcoxon signed rank test , equivalence (formal languages) , reliability (semiconductor) , statistics , correlation , spearman's rank correlation coefficient , test (biology) , multivariate statistics , rank correlation , clinical psychology , mathematics , psychometrics , mann–whitney u test , quantum mechanics , biology , paleontology , power (physics) , physics , geometry , discrete mathematics
Objective To obtain two equivalent short forms of the “Situational Feature Recognition Test, Version 2,” a social perception test, and their psychometric properties. Methods Patients with schizophrenia ( n = 101) were assessed at two different times. Statistical analyses were performed as follows: (1) Cronbach's alpha was used to assess reliability; (2) Spearman correlations, Wilcoxon signed‐rank test, and a 2 (form) × 2 (time) repeated measures multivariate analysis of variance were used to analyse interform equivalence; (3) Sensitivity to change was studied by a 2 (group) × 2 (time) repeated measures multivariate analysis of variance; (4) Spearman correlations were employed to assess test–retest reliability, convergent and discriminant validity, and relationship with functionality and symptoms. Results The short forms showed good internal consistency at both times. Significant and moderate correlation between forms was found along with no statistically significant form x time interaction. Hits and false positives of both forms were moderately correlated at both times. Group x time interaction was significant especially for hits when assessing sensitivity to change. Both forms were significantly correlated with other social cognition domains and with functionality. Conclusions Results of this study support the use of short forms of the Situational Feature Recognition Test, Version 2 especially in clinical trials and longitudinal studies among patients with schizophrenia.