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Test-retest reliability of the dementia rating scale-2: alternate form

Kara S Schmidt1, Paul J Mattis, Jane Adams

  • 1Center for Aging, University of Medicine & Dentistry of New Jersey, Stratford, NJ 08084, USA. stutzschmidt@juno.com

Dementia and Geriatric Cognitive Disorders
|April 16, 2005
PubMed

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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.
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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.