“One Metric to Rule Them All”: A Common Metric for Symptoms of Depression and Generalized Anxiety in Adolescent Samples

Author:

Sunderland Matthew1ORCID,Olsen Nicholas1,Visontay Rachel1,Chapman Cath1,Mewton Louise2,Stapinski Lexine1,Newton Nicola1,Teesson Maree1,Slade Tim1

Affiliation:

1. The Matilda Centre for Research in Mental Health and Substance Use, University of Sydney

2. Centre for Healthy Brain Ageing, University of New South Wales

Abstract

There is a significant degree of heterogeneity in scales that purport to measure depression and generalized anxiety in adolescent samples, which makes it difficult to directly compare scores across studies. The aim of the current study is to develop a common metric that facilitates the comparison of scores from different but related scales of depression and generalized anxiety using a large adolescent sample. A nonequivalent-anchor-test design in conjunction with simultaneous calibration was used to equate and develop a common metric for six different scales. The common metric provided scores with acceptable levels of precision across the −1 to 3 range on θ, which represents the more severe and often clinical end of the spectrum. Thus, in the current study, we identified a coherent common metric that is closely aligned with the “distress” subfactor of the Hierarchical Taxonomy of Psychopathology model. Additional validation testing in independent samples is now required.

Funder

Australian Rotary Health

Publisher

SAGE Publications

Subject

Clinical Psychology

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