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. 2018 Dec;27(4):e1741.
doi: 10.1002/mpr.1741. Epub 2018 Sep 20.

Measurement invariance of the Spanish Launay-Slade Hallucinations Scale-Extended version between putatively healthy controls and people diagnosed with a mental disorder

Sara Siddi  1   2   3 , Susana Ochoa  1   2 , Aida Farreny  4 , Gildas Brébion  1   2 , Frank Larøi  5   6   7 , Jorge Cuevas-Esteban  1   2   8 , Josep Maria Haro  1   2 , Christian Stephan-Otto  1   2 , Antonio Preti  3   9
Affiliations

Measurement invariance of the Spanish Launay-Slade Hallucinations Scale-Extended version between putatively healthy controls and people diagnosed with a mental disorder

Sara Siddi et al. Int J Methods Psychiatr Res. 2018 Dec.

Abstract

Objectives: The current study aimed at evaluating the reliability, convergent and divergent validity, and factor structure of the Spanish Launay-Slade Hallucinations Scale-Extended version (LSHS-E) in people with mental disorders and healthy controls.

Methods: Four hundred and twenty-two individuals completed the Spanish LSHS-E and the Spanish Community Assessment of Psychic Experiences. The convergent and divergent validity of the LSHS-E was assessed with the three dimensions of the Community Assessment of Psychic Experiences (positive, negative, and depressive dimensions) in healthy controls and people with a mental disorder. Factor structure of the LSHS-E was assessed using confirmatory factor analysis and measurement invariance.

Results: The LSHS-E had a good reliability in healthy controls and people with a mental disorder (Cronbach's = 0.83 and 0.91, respectively). The LSHS-E was more strongly associated with positive psychotic-like experiences than with depressive and negative symptoms. Four factors were found: (a) "intrusive thoughts"; (b) "vivid daydreams"; (c) "multisensory hallucination-like experiences"; and (d) "auditory-visual hallucination-like experiences" that were invariant between the group of healthy controls and people with a mental disorder.

Conclusion: The Spanish version of the LSHS-E possesses adequate psychometric properties, and the confirmatory factor analysis findings provide further support for the multidimensionality of proneness to hallucination in clinical and nonclinical samples.

Keywords: Launay-Slade Hallucination Scale; factor analysis; hallucinatory proneness; measurement invariance; sensitivity and specificity analyses.

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Figures

Figure 1
Figure 1
Statistical comparison of the ROC curves between the predictive capacity of the auditory and visual HLEs factors and the other three factors of the LSHS‐E in differentiating patients with psychosis from putatively healthy controls. The statistical significance of the difference between the areas under the dependent ROC curves (derived from the same cases) with the method of DeLong et al. (1988) is reported. HLEs: hallucination‐like experiences; ROC: receiver operating characteristic
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