reliability

Examples of reliability in the following topics:

• Measurement

  • A good measurement scale should be both reliable and valid.
  • Therefore, reliability is not a property of a test per se but the reliability of a test in a given population.
  • where k is the factor by which the test length is increased, rnew,new is the reliability of the new longer test, and rtest,test is the current reliability.
  • For example, if a test with 50 items has a reliability of .70 then the reliability of a test that is 1.5 times longer (75 items) would be calculated as follows
  • Obviously adding poor items would not increase the reliability as expected and might even decrease the reliability.

• Exercises

  • What is the reliability if the true score variance is 80 and the test score variance is 100?
  • What is the effect of test length on the reliability of a test?
  • What is the theoretical maximum correlation of a test with a criterion if the test has a reliability of .81?

• Variations in Accuracy

  • Make sure all sources of information for your speech are accurate, reliable, unbiased, credible, and current.
  • " You'll want to make sure your sources are reliable, unbiased, and current.
  • To find academic and scholarly sources, asking your local librarian is one of the best ways to validate whether or not a source you have found is reliable, unbiased, and current.
  • Choose reliable sources when researching in order to assure your speech's accuracy

• Surveys

  • Reliable measures of self-report are defined by their consistency.
  • Thus, a reliable self-report measure produces consistent results every time it is executed.
  • A test’s reliability can be measured a few ways.
  • First, one can calculate a test-retest reliability.
  • Self-report measures will generally be more reliable when they have many items measuring a construct.

• Evaluating Material from the Internet

  • The biggest disadvantage, then, is parsing through the bevy of information to find credible, reliable, accurate information.
  • The following top-level domains (TLD) can give you an idea of how reliable and accurate the information may be:
  • Reliability and credibility not always guaranteed.
  • Like text sources, media sources must be produced by a reliable third party and be properly cited.
  • Evaluate online sources to assure that they are credible, reliable, and accurate

• Validity and Reliability of Personality Assessments

  • When it comes to examining the validity and reliability of personality measures, some have better psychometric properties than others.
  • Reliability scales test the instrument’s consistency over time, assuring that if you take the MMPI today and then again five years later, your two scores will be similar.
  • The result is that the Eysenck Personality Questionnaire has excellent reliability and validity.
  • This is one reason why horoscopes continue to be popular and trusted despite their lack of reliability or validity.
  • Evaluate the concepts of validity and reliability in the context of personality assessment

• The Importance of Reliability

  • Using reliable sources in research papers strengthens your own voice and argument.
  • When researching, it is important to determine the position and the reliability of every source/author.
  • If the answers to these types of questions are not readily available, it may be best to look in other places for a reliable source.
  • Remember, when researching, the goal is not only to gather sources, but to gather reliable resources.
  • These may lead you to decide that one source is more reliable than another.

• Sources of Information

  • Online publications and blogs may not have such reliable fact-checking procedures.
  • For most topics, current articles are more reliable than old articles, although some topics call for older research.
  • News reporting from less-established outlets is generally considered less reliable for statements of fact.
  • Editorial commentary, analysis and opinion pieces, whether written by the editors of the publication (editorials) or outside authors (op-eds) are reliable primary sources for statements attributed to that editor or author, but are rarely reliable for statements of fact.
  • When taking information from opinion content, the identity of the author may help determine reliability.

• Reporting Contingencies

  • The amount of the loss can not be reliably measured or estimated.
  • A probable loss contingency can be measured reliably if it can be estimated based on historical information.
  • Such contingent liabilities can be estimated reliably based on historical cost and readily available information.

• Calculating carbon footprints

  • For more information about carbon footprints and their calculation, consult the free online calculators available on the websites of reputable environmental organizations, government departments and/or reliable energy organizations (note: make sure that your calculations take into account the energy practices and energy sources of your specific country or region).