Chapter 5 - Quality of Measurement

Question 1

Validity

Answer 1

Meaningful
Relevance
Data is directly relevant to what is being measured and the reason it is being measured

Question 2

Accuracy

Answer 2

True Value

observed value matches the true value

Question 3

Reliability

Answer 3

Consistent Measure

When the value remains consistent over repeated measure

Question 4

Measurement Bias

Answer 4

error in measurement likely in one direction

Question 5

Trustworthy Data

Answer 5

Measurement must be both valid and accurate

Question 6

Threats to measurement

Answer 6

1. Measurement is indirect, measured in a different way
2. Measuring the wrong thing or dimension of bx
3. Measurement artifacts

Question 7

Measurement artifacts

Answer 7

Data gives misleading picture due to how it was measured

a. discontinuous measurement
b. poorly scheduled measurement periods

Question 8

Threats to Measurement Accuracy and Reliability

Answer 8

Human Error (biggest error)

a. poorly designed measurement system
b. inadequate training
c. unintended influence on observers

Question 9

Observer Drift

Answer 9

observers alter, unknowingly the way they are measuring

Question 10

Observer Reactivity

Answer 10

a. measurement error from an observer’s awareness of others evaluating data
b. a participant’s awareness of their bx being observed