Validating a psychometric instrument

As the competing health priorities of infectious illness and malnutrition are diminishing in these settings, awareness of mental health is growing.

There is an increasing need for screening tools, which primary health care staff can use, to identify people experiencing common mental disorders in the community.

Ha Nam has a population of 0.8 million inhabitants and, in 2011, an average annual per capita income of USD800.

Most people earn income from rice farming and making handcrafts and some are employed in local industries.

However, there has not yet been a validation study of the DASS21 against a clinical diagnostic test to propose and verify cut-off scores to detect common mental disorders.

There is only a small set of psychometric instruments to detect symptoms of common mental disorders that have been validated for use in Vietnam.

The purpose of this study was to conduct a validation analysis of an SET and provide a validation framework of SETs that can be included when designing complete evaluations of teaching within higher education institutions.

A series of Rasch analyses was conducted on the results of the SET, examining the responses of students within a college and three departments.

Psychometric testing can addvaluable information to the selection process but as Cronbach observed, measurement instruments themselves do not have validity, but validity resides in the interpretation of the instrument.Psychometric assessments give you insights that you cannot get through interviewing and when coupled with a behavioural interview, are a very good predictor of how successful the person will be in the role.Psychometrictests can be used for selection and development purposes and the selection of tests used is based on the particular circumstances.There are two forms of the DASS, the full 42-item and the short 21-item versions. There is evidence of the validity of the DASS for the use in both clinical and community settings in English-speaking countries including Australia [ 0.7).Previous investigations in English-speaking and non-English-speaking countries have found significant correlations between DASS scores and other measures including the Beck Anxiety and Beck Depression Scales (correlation coefficients, r, ranged from 0.58 to 0.78, []).

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