Exam 13: Reliability and Validity

A group of researchers developing an instrument to measure hope performed a test-retest on the instrument with an interval of 5 days.This testing resulted in a correlation coefficient of 0.38.How should the nurse researcher interpret this finding?

When would a nurse researcher want to use a Kuder-Richardson (KR-20)coefficient to establish the internal consistency of an instrument?

The interrater reliability of a new instrument is established to be 40%.What is the correct interpretation of this finding?

A nurse investigator administers an instrument to subjects attending a chemical dependence meeting and to subjects who abstain from alcohol and drugs.Which type of validity is this investigator attempting to establish?

What terms are applied to variability in test scores attributed to error rather than to actual differences in behavior? (Select all that apply.)

The nurse researcher notes that test-retest correlations were r = 0.79 when given over 4-week intervals.How should this be interpreted?

Testing of a new instrument demonstrates that it has a high degree of internal consistency.What is the significance of this to the nurse researcher?

How can a nurse researcher determine an instrument's homogeneity?

What type of validity is demonstrated when a nurse researcher submits items of an instrument to a panel of experts to evaluate item clarity and reflection of the concept under consideration?

In testing an instrument consisting of 25 items for homogeneity using the item to total correlation,eight items were found to have a low correlation to the total.How should the researcher use this information?

When would a nurse researcher want to use a Cronbach's alpha coefficient to establish the internal consistency of an instrument?

A newly developed instrument is found to have a Cronbach's alpha of 0.82.How should the nurse researcher interpret this finding?

The reliability coefficient of a new instrument designed to measure anxiety is established at 0.86.How should a nurse researcher interpret this finding?

How should the nurse researcher describe variability in test scores attributed to error rather than to actual differences in behavior? (Select all that apply.)

What property is established when the results of two separately administered tests that measure the same domain or concept are highly correlated?

How should the researcher proceed if the initial test for reliability of an instrument has been conducted on a sample that has different characteristics from those of the current study sample?

Which measures used to test reliability are specific for equivalence? (Select all that apply).

Which type of reliability can be defined as consistency of observation between two or more research assistants?

How should a nurse researcher describe an instrument that produces the same result when it is administered to the same subjects under similar conditions on two or more occasions?

How should a nurse researcher describe an instrument that is administered repeatedly and obtains the same results?