Measurement and assessment of research results
This presentation is the property of its rightful owner.
Sponsored Links
1 / 13

Measurement and Assessment of Research Results PowerPoint PPT Presentation


  • 46 Views
  • Uploaded on
  • Presentation posted in: General

Measurement and Assessment of Research Results. Four Levels or Scales of Measurement. Nominal Ordinal Interval Ratio. Four Levels or Scales of Measurement. Nominal – A, B, C, or 1, 2, 3 EX: 1 = boys, 2 = girls; 1 = in sports, 2 = not in sports;

Download Presentation

Measurement and Assessment of Research Results

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Measurement and assessment of research results

Measurement and Assessment of Research Results


Four levels or scales of measurement

Four Levels or Scales of Measurement

  • Nominal

  • Ordinal

  • Interval

  • Ratio


Four levels or scales of measurement1

Four Levels or Scales of Measurement

  • Nominal – A, B, C, or 1, 2, 3

    • EX: 1 = boys, 2 = girls;

    • 1 = in sports, 2 = not in sports;

    • 1 = reduced lunch, 2 = not reduced lunch

    • 1 = freshmen, 2 = sophomores, 3 = juniors, 4 = seniors

    • 1 = American, 2 = Canadian, 3 = Mexican

    • 1 = experimental group, 2 = control group


Four levels or scales of measurement2

Four Levels or Scales of Measurement

  • Ordinal– Rank from first to last, best to worst. Items are ranked, but the distance between them is unknown and variable.

  • EX: 1st in class, 2nd in class, 3rd in class

  • 1st place in race, 2nd place, 3rd place

  • No. #1 song, #2 song, #3 song

  • Valedictorian, Salutatorian


Four levels or scales of measurement3

Four Levels or Scales of Measurement

  • Interval– Rank with equal intervals or distance between numbers; lacks an absolute-zero point

    • EX: A students, B students, C students, D students

  • Fahrenheit, Celsius, IQ,


Four levels or scales of measurement4

Four Levels or Scales of Measurement

  • Ratio– Has all the properties of nominal, ordinal, interval scales plus an absolute-zero point

    • EX: A test where someone could miss all answers (number of right answers could equal zero)

    • Annual income, height, weight, response time


Other terms

Other terms

  • Testing and assessment

    • Testing – measuring variables with a device

    • Assessment – gathering and integrating data – tests, interviews, observations – to make an evaluation

  • Traits and States

    • Traits – long-term characteristics

      • Free-floating anxiety

    • States – short-term characteristics

      • Situational anxiety


Identifying a good test or assessment procedure reliability and validity

Identifying a good test or assessment procedure - Reliability and Validity

  • Reliability – if the student takes the same test multiple times, does he get nearly identical scores

    • Test + retest has pollutants. Familiarity with the test if the time is too short, growth of the individual if the time is too long


Identifying a good test or assessment procedure reliability and validity1

Identifying a good test or assessment procedure - Reliability and Validity

  • Split-Half Reliability – split the test in two

    • Ex: odd questions vs even questions, first 25 questions vs next 25 questions


Identifying a good test or assessment procedure reliability and validity2

Identifying a good test or assessment procedure - Reliability and Validity

  • Validity – Does the test support the actions we take based on the scores

  • Does it test for the traits we were researching?

  • Gathering evidence supporting the score inference

    • EX: IQ of 130 assures success in college; if many show IQ of 130, but fail college, test may lack validity

    • EX: High scores on algebra aptitude test imply success in algebra class; use validity coefficient or expectancy data to determine. Kids fail algebra, problem with test


Achievement vs aptitude tests

Achievement vs Aptitude tests

  • Achievement tests measure degree of learning after a person has been exposed to a specific learning experience

  • Aptitude tests measure broader learning based on information acquired through a lifetime of learning


Additional examples of expectancy data aptitude tests

Additional examples of Expectancy Data = Aptitude Tests

  • SAT for college bound imply they will succeed

  • CSAT for teachers imply they will succeed

  • LSAT for law students imply they will succeed

  • MCAT for medical students imply they wil succeed


  • Login