QUESTION 1 10.00000 points Save Answer Match each threat to internal validity wi

Question

QUESTION 1 10.00000 points Save Answer Match each threat to internal validity with the strategy that BEST controls it: Much higher attrition in one group compared to the other # Compensatory demoralization # Compensatory equalization # Regression to the mean Intent to treat analysis B. Participant blinding C. Researcher/staff blindin Reliable outcome measures Calibration and documentation - Instrumentation .Participants document activities outside of study - History Practice/warm-up sessions # Testing Careful randomization - Selection interaction QUESTION 2 10.00000 points Save Answer Consider the Disabilities of the Hand, Arm and Shoulder (DASH) questionnaire. Match each concept with the appropriate type of validity/reliability: A Test-retest reilability B. Criterion validity C. MCIC D.Content validity A patient will get similar scores on consecutive days. The DASH appears to include items related to the full scope of hand/arm pain as determined by a panel of experts. Scores on the DASH can predict scores on occupational performance assessments 1 month later # A change of 10.2 points represents an important change to patients.

Explanation / Answer

Question 2:

Patients will get similar scores on consecutive days: Test-retest- the same test is administered two times to the same individual at different time periods in order to assess whether the results are similar. If there is a high correlation between the two scores, then there is internal reliability for the test.

The DASH appears to have items of full scope…..: Content validity: content validity measures if the test covers adequate amount of information related to the topic. Whether, the test includes all aspects of the variable/ factor.

Scores of DASH can predict scores on occupational performance… Criterion-related validity: sees whether the results are correlated with another established measure

A change of 10.2 score represents important change to patients: MCIC

Question 1

Testing- Practice/ warm up sessions (testing effects refer to familiarity with the test which will impact the results of the test as performance changes due to familiarity or carry over effects)

Instrumentation- reliable outcome measures (instrumentation refers to the wear and tear of tool that may affect the results and may does have the correct precision)

Compensatory equalization- Researcher/ staff blinding

Compensatory demoralization: participant blinding

I have not answered all the questions in the first question as I am unsure of it. So you do not have to up vote.

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