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Evaluation of methods used for estimating content validity.

Enas Almanasreh1, Rebekah Moles1, Timothy F Chen1

  • 1Sydney Pharmacy School, N511, Pharmacy and Bank Building A15, The University of Sydney, 2006, NSW, Australia.

Research in Social & Administrative Pharmacy : RSAP
|April 3, 2018
PubMed
Summary
This summary is machine-generated.

Content validity is crucial for developing reliable assessment instruments in pharmacy research. This review details methods for evaluating content validity, including expert panels and indices like CVI, to ensure instrument quality.

Keywords:
Content validityHealth and social science researchInstrument developmentMethodological researchValidity

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Area of Science:

  • Social and administrative pharmacy research
  • Health outcomes research
  • Instrument development

Background:

  • Content validity is a critical but complex step in developing assessment instruments.
  • Instruments are frequently used to measure complex constructs in social and administrative pharmacy.
  • Ensuring content validity is essential for the reliability and applicability of research tools.

Purpose of the Study:

  • To investigate the elements of content validity.
  • To describe a practical approach for assessing content validity.
  • To discuss existing content validity indices.

Main Methods:

  • This study is a narrative review of content validity assessment and quantification.
  • It describes key stages of content validation studies.
  • Expert panel judgments are quantified using indices like Content Validity Ratio (CVR) and Content Validity Index (CVI).

Main Results:

  • Content validity assesses the relevance and representativeness of instrument elements to a target construct.
  • A three-stage process (development, judgment/quantification, revision) is outlined for content validation.
  • Several indices (CVR, CVI, modified-Kappa) are discussed for quantifying expert judgments.

Conclusions:

  • Content validation processes and indices are essential for instrument development, comparable to other construct validation types.
  • Determining item CVI and overall CVI is vital, especially for instruments measuring health outcomes or guiding clinical decisions.
  • Rigorous content validity assessment is invaluable for ensuring the quality of newly developed instruments.