Rasch-modeling the Portuguese SOCRATES in a clinical sample

Paulo Lopes; Gerardo Prieto; Ana R. Delgado; Pedro Gamito; Hélder Trigo

doi:10.1037/a0019080

Rasch-modeling the Portuguese SOCRATES in a clinical sample

Paulo Lopes, Gerardo Prieto, Ana R. Delgado, Pedro Gamito, Hélder Trigo

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

The Stages of Change Readiness and Treatment Eagerness Scale (SOCRATES) assesses motivation for treatment in the drug-dependent population. The development of adequate measures of motivation is needed in order to properly understand the role of this construct in rehabilitation. This study probed the psychometric properties of the SOCRATES in the Portuguese population by means of the Rasch Rating Scale Model, which allows the conjoint measurement of items and persons. The participants were 166 substance abusers under treatment for their addiction. Results show that the functioning of the five response categories is not optimal; our re-analysis indicates that a three-category system is the most appropriate one. By using this response category system, both model fit and estimation accuracy are improved. The discussion takes into account other factors such as item format and content in order to make suggestions for the development of better motivation-for-treatment scales.

Original language	English
Pages (from-to)	355-359
Number of pages	5
Journal	Psychology of Addictive Behaviors
Volume	24
Issue number	2
DOIs	https://doi.org/10.1037/a0019080
Publication status	Published - Jun 2010

Keywords

Addiction
Motivation
Rasch Rating Scale Model
SOCRATES

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1037/a0019080

Cite this

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abstract = "The Stages of Change Readiness and Treatment Eagerness Scale (SOCRATES) assesses motivation for treatment in the drug-dependent population. The development of adequate measures of motivation is needed in order to properly understand the role of this construct in rehabilitation. This study probed the psychometric properties of the SOCRATES in the Portuguese population by means of the Rasch Rating Scale Model, which allows the conjoint measurement of items and persons. The participants were 166 substance abusers under treatment for their addiction. Results show that the functioning of the five response categories is not optimal; our re-analysis indicates that a three-category system is the most appropriate one. By using this response category system, both model fit and estimation accuracy are improved. The discussion takes into account other factors such as item format and content in order to make suggestions for the development of better motivation-for-treatment scales.",

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AU - Lopes, Paulo

AU - Prieto, Gerardo

AU - Delgado, Ana R.

AU - Gamito, Pedro

AU - Trigo, Hélder

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Rasch-modeling the Portuguese SOCRATES in a clinical sample

Abstract

Keywords

UN SDGs

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