RSCH 2501 Week 6 Lecture Slides - Validity

RSCH 2501 Week 6 Lecture Slides - Validity -...

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RSCH 2501  /  RSCH 4301                     Introduction to Research Methods ϖεεκ 6
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T ODAY ‘heads up’ for Week 7 assignment “anatomy” of a research article Week 8 assignment Validity and Reliability
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C OMING UP Week 7 assignment: read an article, join a group, take a quiz Week 8: lit search assignment due Weeks 8 and 9 – statistics week 10: read an article (to be assigned by week 8), join another group, take another quiz
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Assignments folder: Read for week 7! J Manipulative Physiol Ther 2007; 30(6): 408-18
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topic relevance:   better understanding of research articles  through understanding of their structure  (including those due next week)   final exam questions! Anatomy of a research article
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A d v e n t u r s   i V ALIDITY NEXT EXIT ! FUN FOR ALL AGES !
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“Validity”   … the best available  approximation to the truth  of a  given proposition, inference, or  conclusion
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Best thought of in terms of degrees: high moderate low invalid
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An in valid test can  be reliable An un reliable test cannot  be valid Can you determine intelligence by  measuring skull circumference?
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Validity:   internal  external  concurrent convergent face content construct criterion predictive consequential
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(from Wikipedia) “Concurrent validity:   one test or evaluation  procedure correlates well with another that has  previously been validated.”
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(from Wikipedia) “Concurrent validity:   one test or evaluation  procedure correlates well with another that has  previously been validated *.” (*The other, if already accepted as valid,  is the “gold standard”.)
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“Concurrent validity:   one test or evaluation procedure  correlates well with another that has previously been  validated.”
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“Concurrent validity:   one test or evaluation procedure  correlates well with another that has previously been  validated.”
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OBJECTIVES : compare  flexicurve surface contour  measurements of the cervical spine  with  radiographic measurements of cervical lordosis.  METHODS:  evaluated 96 patients with chronic neck  pain in neutral posture using a flexible ruler,  flexicurve, to measure sagittal contour of the skin  over the cervical spine  CONCLUSION:  The  flexicurve  sagittal skin contour  measurement  has poor  concurrent validity   compared with established radiographic  measurements  of the cervical lordosis.  Harrison DE, Haas JW, Cailliet R, Harrison DD, Hollans B, Janik TJ. Concurrent validity of  flexicurve instrument measurements: sagittal skin contour of the cervical spine compared with  lateral cervical radiographic measurements. J Manipulative Physiol Ther 2005; 28(8): 597-603.
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This note was uploaded on 11/22/2011 for the course RSCH 2501 taught by Professor Brents.russell during the Winter '11 term at Life Chiropractic College West.

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RSCH 2501 Week 6 Lecture Slides - Validity -...

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