Example think about taking the nclex over and over

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Example: Think about taking the NCLEX over and over... What is systematic measurement error? the variation in measurement value from the calculated average is always in the same direction. For example: most of the variation may be higher or lower than the average that was calculated. Example: Why does my scale at home routinely weigh me at 150lbs in the morning .... but the scale at the MD's office weigh me at 157lbs for an 0830 appointment?!?! What is reliability? is concerned with the consistency of the measurement method. What are the three aspects of reliability testing? stability, equivalence, and homogeneity
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What is stability? A type of reliability testing that focuses on the consistency of results when a test is repeated. It is also called test-retest reliability. It is expressed as an "r" value with higher numbers = greater test-retest reliability. What is equivalence? A type of reliability which involves the comparison of two versions of the same pencil and paper instrument or two observers who are observing (or grading) the same event. Two versions of the same test = alternate forms reliability Two judges rating the same person = inter-rater reliability It is expressed as an "r" value with values above .8 = greater IRR or alternate forms reliability. What is homogeneity? A type of reliability testing that is used with pencil and paper testing. It addresses the correlation (or relationship) of each question on the test to other questions on the test. It basically asks...are the questions all asking about the same basic constructs? This is also known as internal consistency. What statistical test is used to check a pencil and paper test for homogeneity or internal consistency? A Cronbach's alpha or a Kuder-Richardson's 20. Both of these are expressed as an "r" value with values above .8 = high internal consistency. Note: internal consistency is checked every time a pencil and paper test is used. If your article for critique used a questionnaire of some sort, then they should report this number for both the questionnaire's development or past use AND the current sample. What is validity? How well does the instrument reflect the abstract concept being measured?
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Hint: validity exists on a spectrum. It is not an all or nothing phenomenon. We try to determine the degree of validity an instrument or questionnaire has for a specific sample or situation. When looking at a measure or questionnaire for validity, we typically descrive this as content validity. Content validity can be broken down into two subtypes. What are they? Content and predictive validity. What is content validity? The extent to which the measurement / questionnaire / scale includes all of the major elements or items relevant to the construct being measured. How do you prove this?
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  • Spring '16
  • Cauble
  • Qualitative Research, researcher

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