1 / 8

Types of Reliability and Validity

Types of Reliability and Validity. Research Methods (cont’d). Types of Reliability. There are four types of reliability measures. For a test/experiment to be deemed ‘reliable,’ it must yield consistent results no matter the circumstances . Four types: Inter-rater Test-retest

mariko
Download Presentation

Types of Reliability and Validity

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. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Types of Reliability and Validity Research Methods (cont’d)

  2. Types of Reliability • There are four types of reliability measures. For a test/experiment to be deemed ‘reliable,’ it must yield consistent results no matter the circumstances. • Four types: • Inter-rater • Test-retest • Parallel-forms • Internal consistency

  3. Types of Reliability (cont’d) • Inter-rater reliability= the test/experiment yields similar results no matter who is giving the test. • This eliminates observer bias. • Test-retest reliability= the test/experiment yields similar results across time. • Factors that can influence test variation: mood, disruptions, time of day. • An unreliable test will vary greatly in results depending on these factors.

  4. Types of Reliability (cont’d) • Internal consistency reliability= the test/experiment will yield similar results, even though different questions are asked. • Questions are different, but material is similar in construct. • Example: The following two questions test the same knowledge, although phrased differently. • Which social science looks at past cultures and societies? • Past cultures and societies are the predominant focus of which social science?

  5. Types of Reliability (cont’d) • Parallel forms reliability= used to determine the best versionof a test/experiment. • Different people take different versions of a test at the same time. • These two versions are done in parallel, to determine which is best. • Example: two field tests are given to students at two different schools on the same day. Whichever test yields more consistent results becomes the nationwide test.

  6. Types of Validity • A test that has validity accurately measures what it is supposed to. • There are 4 main types of validity that are important to sociological research: • Construct validity • Content validity • Conclusion validity • Face validity

  7. Types of Validity • Construct validity= determines the quality of an instrument, test or experiment. • Does it measure what it is designed to measure? • Content validity= measures what it is supposed to measure AND includes an adequate sample. • Does the measurement include different groups or does it focus on the knowledge/characteristics of one specific group?

  8. Types of Validity (cont’d) • Conclusion validity= a relationship between two variables can be determined, either positive or negative. • Face validity= appears to be valid on the surface. This should not be the sole factor in determining validity!!! • It can, however, be a good springboard for experimental design– does your experiment seem like it will work?

More Related