Chapter 15 pwpt

Question 1

What is validity?

Answer 1

Is the measurement accurate?

Question 2

What is reliability?

Answer 2

Is the measure consistent?

Question 3

What is error variance?

Answer 3

Variability attributable to error

Question 4

Observed score=?

Answer 4

True score + error

Question 5

Observed test score could be either?

Answer 5

Chance or random error
Or
Systematic or constant error

Question 6

Chance or random error is?

Answer 6

Errors difficult to control

Question 7

Systematic or constant error is?

Answer 7

Measurement error that is attributable to relatively stable characteristics of the study sample that may bias their behavior and/or cause incorrect instrument calibration

Question 8

What are the three major kinds of validity?

Answer 8

Content validity
Criterion related
Construct

Question 9

What is content validity?

Answer 9

Representative of the concept?
Panel of experts to assess items
Content validity index= index of interrater agreement or relevance
Face validity= the appearance of measuring the construct/concept

Question 10

Criterion related validity is?

Answer 10

Concurrent= degree of correlation between two measures

Predictive= degree of correlation between a measure and a future measure

Question 11

Construct validity is?

Answer 11

Extent that test measures a theoretical construct, attribute or a trait

Question 12

Examples of construct validity are?

Answer 12

Hypothesis testing approach, multi-trait multimethod, factor analytic approach

Question 13

Major tests of reliability are?

Answer 13

Test-retest
Parallel or alternate form
Item-total correlation
Split-half
Kuder-Richardson (KR-20)
Cronbach’s alpha
Interrater reliability

Question 14

A measure can be reliable but not _____?

Answer 14

Valid

Question 15

A valid instrument, however, is ____________.

Answer 15

Reliable

Question 16

Appraising the evidence of reliability and validity

Answer 16

How was the validity of the instrument determined?
Is the validity of the measurement tool adequate?
How was the reliability of the tool tested?
Is the reliability of the tool adequate?
What kinds of threats to internal or external validity are presented by weaknesses in reliability and/or validity?
Are strengths and weaknesses of the reliability and validity appropriately addressed in the “Discussion,” “Limitations,” or “Recommendations” sections of the report?
How do the reliability and validity affect the strength and quality of the evidence provided by the study findings?

Question 17

Which of the following is addresses when data collection procedures stress the use of the same technique each time a blood pressure is obtained in a nursing study on the effect of pain management on blood pressure?

Answer 17

Interrater reliability

Question 18

What is the most common test for internal consistency (reliability) of an instrument measuring a concept such as self efficacy?

Answer 18

Cronbach’s alpha