Measurement practices in hallucinations research

Smailes, D., Alderson-Day, B., Hazell, C.M., Wright, A. and Moseley, P. 2021. Measurement practices in hallucinations research. Cognitive Neuropsychiatry. 27 (2-3), pp. 183-198. https://doi.org/10.1080/13546805.2021.1999224

TitleMeasurement practices in hallucinations research
TypeJournal article
AuthorsSmailes, D., Alderson-Day, B., Hazell, C.M., Wright, A. and Moseley, P.
Abstract

Introduction
In several sub-fields of psychology, there has been a renewed focus on measurement practices. As far as we are aware, this has been absent in hallucinations research. Thus, we investigated (a) cross-study variation in how hallucinatory experiences are measured and (b) the reliability of measurements obtained using two tasks that are widely employed in hallucinations research.

Method
In Study 1, we investigated to what extent there was variation in how the Launay-Slade Hallucination Scale (LSHS) has been used across 100 studies. In Study 2, we investigated the reliability of the measurements obtained through source monitoring and signal detection tasks, using data from four recent publications. Materials/data are available at doi: 10.17605/osf.io/d3gnk/.

Results
In Study 1, we found substantial variation in how hallucinatory experiences were assessed using the LSHS and that descriptions of the LSHS were often incomplete in important ways. In Study 2, we reported a range of reliability estimates for the measurements obtained using source monitoring and signal discrimination tasks. Some measurements obtained using source monitoring tasks had unacceptably low levels of reliability.

Conclusions
Our findings suggest that suboptimal measurement practices are common in hallucinations research and we suggest steps researchers could take to improve measurement practices.

JournalCognitive Neuropsychiatry
Journal citation27 (2-3), pp. 183-198
ISSN1354-6805
1464-0619
Year2021
PublisherTaylor & Francis
Publisher's version
License
CC BY 4.0
File Access Level
Open (open metadata and files)
Digital Object Identifier (DOI)https://doi.org/10.1080/13546805.2021.1999224
Publication dates
Published online08 Nov 2021
Published in print2021

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