psych 2017 Chapter 5 vocabulary:Set 1 Scales of measurement, psychometric

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psych 2017 Chapter 5 vocabulary:Set 1 Scales of measurement, psychometric
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psych 2017 Chapter vocabulary Set Scales measurement psychometric
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psych 2017 Chapter 5 vocabulary Set 1 Scales of measurement, psychometric
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  1. Variable
    a condition or characteris that cand take on different values or categories
  2. measurement
    the asignment of symbols or numbers to something according to a set of rules
  3. Nominal Scale
    • The use of symbols, such as words or numbers, to classify or categorize measurement objects into groups or types
    • ex: gender, marital status
  4. ordinal scale
    • a rank order measurement scale
    • ex: social class, letter grade, order of finish in race
  5. Interval Scale
    • has equal intervals or distances between adjacent numbers
    • ex: IQ scores, year, temperature
  6. Ratio Scale
    • Fully quantitative, include rank ordering, equal intervals, plus has an absolute zero point
    • ex: response time, height, weight, annual income
  7. Reliability
    the consistency or stability of scores
  8. Reliability coefficient
    type of correlation coefficient used as an index of reliability
  9. Test-retest reliability
    Consistency of a group of individuals' scores on a test over time
  10. Equivalent-forms reliability
    Consistency of a group of individuals' scores on two version of the same test
  11. Internal Consistency reliability
    Consistency with which items on a test measure a single construct
  12. Coefficient alpha
    The most frequencyly used index of internal consistency also called the Cronbach's alpha
  13. interrater reliability
    the degree of consistency or agreement between two or more scorers, judges, observers, or raters
  14. Interobserver agreement
    The percentage of time that different observers' ratings are in agreement
  15. Validity
    Accuracy of inferences, interpretations, or actions made on the basis of test scores
  16. operationalization
    the way a construct is represented and measured in a particular research study
  17. Validation
    Gathering of evidence regarding the soundness of inferences made from test scores
  18. Content-related evidence or content validity
    Judgement by experts of the degree to which items, tasks, or questions on a test adequately represent the construct
  19. Face Validity
    Prima facie judgement of whether the items appear to represent the construct and whether the test or instrument looks valid
  20. Multidimensional Construct
    Construct consisting of two or more dimension; contrasted with a unidimensional construct
  21. Factor analysis
    A statistical analysis procedure used to determine the number of dimensions present in a set of items
  22. Homogeneity
    The degree to which a set of items measures a single construct
  23. Validity coefficient
    the type of correlation coefficient used in validation research
  24. criterion-related validity
    degree to which scores predict or relate to a known criterion such as a future performace or an already- established test
  25. predictive validity
    degree to which scores obtained at one time correctly predict the scores on a criterion at a later time
  26. Concurrent validity
    Degree to which test scores obtained at one time correctly relate to the scores on a known criterion obtained at approximately the same time
  27. Convergent validity evidence
    Validity evidence based on the degree to which the focal test score correlate with independent measures of the same construct
  28. Discrimant validity evidence
    Validity evidence based on the degree to which the focal test scores do not correlate with measure of different constructs
  29. Known groups validity evidence
    Degree to which groups that are known to differ on a construct actually differ according to the test used to measzure to construct
  30. Norming group
    the reference group upon which reported reliability and validity evidence is based

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