To evaluate the psychometric properties of the Italian translation of the Schedule for Nonadaptive and Adaptive Personality-2 (SNAP-2) diagnostic scales, 837 Italian community-dwelling adults and 429 consecutively admitted Italian psychiatric adults were administered the SNAP-2. The 12 SNAP-2 diagnostic scales yielded reliable scores in both community (median ω value = .90) and psychiatric (median ω value = .92) samples. The 6-month temporal stability was adequate for all SNAP-2 diagnostic scales (median test-retest r-value = .84) in a subsample of the community-dwelling adults (n = 97). When we examined the correlations between the SNAP-2 diagnostic scales and the Five-Factor Model Rating Form trait scales among the community-dwelling adults, the double-entry intraclass correlation values (median ICCDE = .94) indicated a marked similarity between our correlation profiles and the correlation profiles that were reported in Samuel and Widiger (2008) meta-analysis. In our psychiatric-adult sample, the SNAP-2 diagnostic scales showed adequate convergent-validity coefficients (median r-value = .61) with criterion measures of DSM-IV axis II/DSM-5 Section II personality disorders (PDs). Finally, relative-weight analysis results showed that selected Personality Inventory for DSM-5 trait-scale scores explained a substantial amount of variance in SNAP-2 antisocial, avoidant, borderline, narcissistic, obsessive-compulsive, and schizotypal PD scale scores (median R 2 value = .55). As a whole, our data suggest that the Italian SNAP-2 diagnostic scales have adequate reliability and construct validity in the Italian culture. (PsycInfo Database Record (c) 2021 APA, all rights reserved).

Reliability and validity of the Diagnostic Scales of the Schedule for Nonadaptive and Adaptive Personality-2 (SNAP-2) in Italian community-dwelling adults and psychiatric patients / Somma, Antonella; Clark, L. A.; Fossati, A.. - In: PSYCHOLOGICAL ASSESSMENT. - ISSN 1040-3590. - 33:10(2021), pp. 998-1012. [10.1037/pas0001041]

Reliability and validity of the Diagnostic Scales of the Schedule for Nonadaptive and Adaptive Personality-2 (SNAP-2) in Italian community-dwelling adults and psychiatric patients

Somma Antonella
Primo
;
Fossati A.
Ultimo
2021-01-01

Abstract

To evaluate the psychometric properties of the Italian translation of the Schedule for Nonadaptive and Adaptive Personality-2 (SNAP-2) diagnostic scales, 837 Italian community-dwelling adults and 429 consecutively admitted Italian psychiatric adults were administered the SNAP-2. The 12 SNAP-2 diagnostic scales yielded reliable scores in both community (median ω value = .90) and psychiatric (median ω value = .92) samples. The 6-month temporal stability was adequate for all SNAP-2 diagnostic scales (median test-retest r-value = .84) in a subsample of the community-dwelling adults (n = 97). When we examined the correlations between the SNAP-2 diagnostic scales and the Five-Factor Model Rating Form trait scales among the community-dwelling adults, the double-entry intraclass correlation values (median ICCDE = .94) indicated a marked similarity between our correlation profiles and the correlation profiles that were reported in Samuel and Widiger (2008) meta-analysis. In our psychiatric-adult sample, the SNAP-2 diagnostic scales showed adequate convergent-validity coefficients (median r-value = .61) with criterion measures of DSM-IV axis II/DSM-5 Section II personality disorders (PDs). Finally, relative-weight analysis results showed that selected Personality Inventory for DSM-5 trait-scale scores explained a substantial amount of variance in SNAP-2 antisocial, avoidant, borderline, narcissistic, obsessive-compulsive, and schizotypal PD scale scores (median R 2 value = .55). As a whole, our data suggest that the Italian SNAP-2 diagnostic scales have adequate reliability and construct validity in the Italian culture. (PsycInfo Database Record (c) 2021 APA, all rights reserved).
2021
SNAP-2 diagnostic scales
reliability
nomological-network validity
five-factor model
DSM-IV axis II/DSM-5 section II personality disorders
Adult
Humans
Independent Living
Italy
Psychometrics
Reproducibility of Results
Translations
Personality Disorders
Psychiatric Status Rating Scales
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11768/127035
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