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Measurement ans scale

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Measurement and scaling

Measurement and scaling

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  • 1. MEASUREMENT DESIGNS
  • 2. Measurement
    • It is the process observing and recording that are collected as apart of research effort.
  • 3. Level of measurement
    • NOMINAL SCALE
    • ORDINAL SCALE
    • INTERVAL SCALE
    • RATIO SCALE
  • 4. NOMINAL SCALE
    • Not really a scale because it don’t scale objects along any dimensions.
    • It simply label objects.
    • Mutually exclusive.
    • Gender is an example of nominal scale
    • Male = 1
    • Female = 2
  • 5. Religious Affiliation
    • Hindu = 1
    • Muslim = 2
    • Sikh = 3
    • Other = 4
    • Categorical data are measured on nominal
    • scales which merely assign labels to distinguish categories.
  • 6. ORDINAL SCALE
    • Meets all the nominal condition and also includes ordering…
    • Data used must be having transitivity property
    • No determination of distance between positions on the scale
  • 7. Examples
    • Restaurant rating
    • Objectives Rank
    • Quality .…
    • Cost .…
    • Flexibility ….
    • Dependability ….
  • 8. INTERVAL SCALE
    • All the property of ordinal scale but the
    • interval between the successive positions are equal.
    • No true zero exist.
    • E.g. Temperature and year
  • 9. RATIO SCALE
    • Attributes of interval scale and exist zero
    • point.
    • E.g. Age, income,height and weight.
  • 10. Ordering of level of measurement
  • 11. Scaling
    • Scaling is the branch of measurement that involves the construction of an instrument that associates qualitative constructs with quantitative metric units.
    • A scale is an instrument which measures subjective variables.
  • 12.
    • Means of measuring attitude
    • It is made up of statements about a particular issue, and
    • each statement has a numerical value indicating how
    • favorable or unfavorable it is judged to be .
    Thurstone scaling
  • 13. E.G. Attitudes that people might have towards persons with AIDS.
  • 14. Some statements are…
    • People get AIDS by engaging in immoral behavior
    • You can get AIDS from toilet seats
    • AIDS is the wrath of God
    • Anybody with AIDS is either gay or a junkie
    • AIDS is an epidemic that affects us all
    • People with AIDS are bad
    • People with AIDS are real people
    • AIDS is a cure, not a disease
    • You can get AIDS from heterosexual sex
    • People with AIDS are like my parents.
    • You can get AIDS from public toilets
    • Women don’t get AIDS
    • AIDS costs the public too much
    • AIDS is something the other guy gets
    • Living with AIDS is impossible
    • Children cannot catch AIDS
  • 15. Rating the scale items…
  • 16. PLOT THE GRAPH
  • 17.
    • Calculate the median and interquartile range(Q3-Q1) for each statement.
    • Figure out table for it.
  • 18. Make table Statement Number Median Q1 Q3 Interquartile Range 10 10 6 10.5 4.5 7 10 7.5 11 3.5 46 10 8 11 3 5 10 8.5 11 2.5
  • 19. Guttman scaling
    • In this items ranges from least extreme to most extreme position.It is implicit that those who agree with a more extreme position also agree with the less extreme positions preceding it.
    • We develop a set of items or statements so that a respondent who agrees with any specific question in the list will also agree with all previous questions.
  • 20. E.g. Measures U.S. citizen attitudes towards immigration. There are list of statements :
    • I would permit a child of mine to marry an immigrant.
    • I believe that this country should allow more immigrants in.
    • I would be comfortable if a new immigrant moved next door to me.
    • I would be comfortable with new immigrants moving into my community.
    • It would be fine with me if new immigrants moved onto my block.
    • I would be comfortable if my child dated a new immigrant.
  • 21. Develop the cumulative scale
  • 22. Hypothetical immigration scale
    • I believe that this country should allow more immigrants in.
    • I would be comfortable with new immigrants moving into my community.
    • It would be fine with me if new immigrants moved onto my block.
    • I would be comfortable if a new immigrant moved next door to me.
    • I would be comfortable if my child dated a new immigrant.
    • I would permit a child of mine to marry an immigrant.
  • 23. Likert scale
    • A rating scale designed to measure attitude or reaction by quantifying subjective information.
    • Participants indicate where along a continuum their attitude or reaction resides.
  • 24. To create set of potential scale items
  • 25. Rating the items 1= strongly unfavorable to the concept 2= somewhat unfavorable to the concept 3= undecided 4= somewhat favorable to the concept 5= strongly favorable to the concept
  • 26. Administrating the scale On a 1-5 response scale : 1= strongly disagree 2= disagree 3= undecided 4= agree 5= strongly agree
  • 27.
    • QUERY
  • 28.
    • THANK YOU

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