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Reliability and validity of the Swedish version of the modified Yale Preoperative Anxiety Scale

M Proczkowska-Björklund¹, I Gimbler Berglund, E Ericsson

¹Division of Child and Adolescent Psychiatry, Department of Clinical and Experimental Medicine, Linköping University, Linköping, Sweden.

Acta Anaesthesiologica Scandinavica

|December 14, 2011

Abstract

Background:

The modified Yale Preoperative Anxiety Scale (m-YPAS) is an observational behavioral checklist that has been widely used as an indicator of pre-operative anxiety in children. The present study describes the translation process of m-YPAS into Swedish and the testing of its reliability and validity when used with Swedish children.

Methods:

The questionnaire was translated using standard forward-back-forward translation technique. The validation process was divided into two phases: a pilot study with 61 children as a first version and a test of a final version with 102 children.

Results:

The reliability tested with Cronbach's alpha was acceptable to good. Interrater reliability analyzed with weighted kappa was acceptable to good with Students Registered Nurse Anesthetists and Certified Registered Nurse Anesthetist (CRNA) as evaluators (phase 1) and good to excellent with CRNA's very experienced in child anesthesia (phase 2). Both concurrent and constructed validity could be demonstrated.

Conclusion:

This validation study of the Swedish version of the m-YPAS shows good consistency, interrater validity, and construct validity when used by experienced assessors.

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Self-Report Tests of Personality

Self-Report Tests of Personality

Self-report inventories are objective personality assessments that use multiple-choice items or numbered scales, typically ranging from 1 (strongly disagree) to 5 (strongly agree). They are often called Likert scales after Rensis Likert. These inventories are widely used due to their ease of administration and cost-effectiveness. One of the most prominent examples is the Minnesota Multiphasic Personality Inventory (MMPI), initially developed in the 1940s to assess abnormal personality traits.

Reliability and Validity

Reliability and Validity

Reliability and validity are two important considerations that must be made with any type of data collection. Reliability refers to the ability to consistently produce a given result. In the context of psychological research, this would mean that any instruments or tools used to collect data do so in consistent, reproducible ways.

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