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Starting at the Beginning: An Introduction to Coefficient Alpha and Internal Consistency
  • D. Streiner
  • Psychology, Medicine
  • Journal of personality assessment
  • 1 February 2003
Cronbach's α is the most widely used index of the reliability of a scale. However, its use and interpretation can be subject to a number of errors. This article discusses the historical developmentExpand
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Health measurement scales
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Health Measurement Scales: A practical guide to thier development and use
1. Introduction 2. Basic concepts 3. Devising the items 4. Scaling responses 5. Selecting the items 6. Biases in responding 7. From items to scales 8. Reliability 9. Generalizability theory 10.Expand
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Guidelines for Reporting Reliability and Agreement Studies (GRRAS) were proposed.
OBJECTIVE Results of reliability and agreement studies are intended to provide information about the amount of error inherent in any diagnosis, score, or measurement. The level of reliability andExpand
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Childhood abuse and lifetime psychopathology in a community sample.
OBJECTIVE The authors assessed lifetime psychopathology in a general population sample and compared the rates of five psychiatric disorder categories between those who reported a childhood history ofExpand
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Biostatistics: The Bare Essentials
Section 1: THE NATURE OF DATA AND STATISTICS 1. The Basics 2. Looking at the Data: A First Look at Graphing Data 3. Describing the Data with Numbers: Measures of Central Tendency and Dispersion 4.Expand
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The Prevalence of Anxiety and Mood Problems among Children with Autism and Asperger Syndrome
The objective of this study was to report on the prevalence and correlates of anxiety and mood problems among 9- to 14- year-old children with Asperger syndrome (AS) and high-functioning autism.Expand
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Being Inconsistent About Consistency: When Coefficient Alpha Does and Doesn't Matter
  • D. Streiner
  • Medicine, Psychology
  • Journal of personality assessment
  • 1 June 2003
One of the central tenets of classical test theory is that scales should have a high degree of internal consistency, as evidenced by Cronbach's α, the mean interitem correlation, and a strong firstExpand
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What's under the ROC? An Introduction to Receiver Operating Characteristics Curves
  • D. Streiner, J. Cairney
  • Psychology, Medicine
  • Canadian journal of psychiatry. Revue canadienne…
  • 1 February 2007
It is often necessary to dichotomize a continuous scale to separate respondents into normal and abnormal groups. However, because the distributions of the scores in these 2 groups most often overlap,Expand
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Diagnosing Tests: Using and Misusing Diagnostic and Screening Tests
  • D. Streiner
  • Medicine, Psychology
  • Journal of personality assessment
  • 1 December 2003
Tests can be used either diagnostically (i.e., to confirm or rule out the presence of a condition in people suspected of having it) or as a screening instrument (determining who in a large group ofExpand
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