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Reliability

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PSYC3020 (Lecture 3: Reliability) Quiz on Reliability , created by chanelle.narayan on 07/10/2014.
chanelle.narayan
Quiz by chanelle.narayan, updated more than 1 year ago
chanelle.narayan
Created by chanelle.narayan about 11 years ago
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Question 1

Question
What is classical test theory?
Answer
  • The concept that every measurement has two parts: true score and measurement error
  • The concept that every measurement has two parts: measurement error and observed score
  • The concept that every measurement has two parts: true score and observed score
  • The concept that every measurement has two parts: measurement error and all unsystematic variance

Question 2

Question
Statement 1: true score theory is the idea that every measurement is split into two parts (actual and error) Statement 2: classical test theory is the concept that every measure is split into two parts (observed and actual)
Answer
  • Both are True
  • Statement 1: True Statement 2: False
  • Statement 1: False Statement 2: True
  • Both are False

Question 3

Question
Statement 1: when calculating the reliability use variance because it is additive Statement 2: reliability in terms of the relationship between true and total variance is true variance/total variance
Answer
  • Statement 1: False Statement 2: True
  • Statement 1: True Statement 2: False
  • Both are true
  • Both are false

Question 4

Question
Which one is NOT a source of measurement error?
Answer
  • Test Construction
  • Test Administration
  • Motivational Factors
  • Test Accuracy

Question 5

Question
Statement 1: we can always estimate reliability directly using true variance and measurement error Statement 2: we can measure reliability using four different types of tests: inter-rater, test-retest, alternate forms and external consistency
Answer
  • Statement 1: False Statement 2: True
  • Both are false
  • Statement 1: True Statement 2: False
  • Both are true

Question 6

Question
What is used to calculate internal consistency when there are more than two possible outcomes?
Answer
  • Regression Analysis
  • Degrees of Freedom
  • Cronbach's Alpha
  • KP-20

Question 7

Question
Statement 1: KR-20 is used instead of Cronbach's alpha when there is a question with only two outcomes Statement 2: Cronbach's alpha is calculated by splitting the data in half, calculating total scores and correlations, repeating for all possible two way splits
Answer
  • Statement 1: False Statement 2: True
  • Both are true
  • Statement 1: True Statement 2: False
  • Both are false

Question 8

Question
Statement 1: Parallel forms are where the two versions of a test have equivalent content and difficulty level Statement 2: Alternate forms are tests where the two versions of the test have a shared mean, SD and correlations with other tests
Answer
  • Both are false
  • Statement 1: true Statement 2: false
  • Both are true
  • Statement 1: false Statement 2: true

Question 9

Question
What measure shouldn't you use when there is a heterogeneous test?
Answer
  • Inter-rater
  • Parallel/Alternate Forms
  • Test-retest
  • Internal consistency

Question 10

Question
Statement 1: when there is a static test it is possible to use test-retest but not when the test has dynamic characteristics Statement 2: when there is a restriction of range reliability estimates are still able to be interpreted
Answer
  • Both are false
  • Both are true
  • Statement 1: true Statement 2: false
  • Statement 1: false Statement 2: true

Question 11

Question
What estimate of reliability would not be appropriate for speed tests?
Answer
  • Inter-rater
  • Internal consistency
  • Test-retest
  • Parallel/alternate

Question 12

Question
Statement 1: increasing the number of items in a test continues to double the amount of reliability Statement 2: the spearman brown formula is used for estimating reliability when a test is shortened or lengthened
Answer
  • Statement 1: false Statement 2: true
  • Both are true
  • Both are false
  • Statement 1: true Statement 2: false

Question 13

Question
What is the standard error of measurement?
Answer
  • standard deviation of the distribution
  • standard deviation of the difference scores
  • variance of the distribution
  • variance of the difference scores

Question 14

Question
How many scores will be within 1 SEM of the true score (+/- 1 SD)?
Answer
  • 68%
  • 58%
  • 95%
  • 99.7%

Question 15

Question
How many scores will be within 1 SEM of the true score (+/- 1 SD)?
Answer
  • 58%
  • 68%
  • 99.7%
  • 95%

Question 16

Question
Statement 1: standard error of the difference is used to work out the margin of error in an individual's score Statement 2: in order for two scores to be significantly different they have to differ by at least 2 standard error of the differences (1.96)
Answer
  • Both are true
  • Statement 1: false Statement 2: true
  • Statement 1: true Statement 2: false
  • Both are false

Question 17

Question
What is the reliable change index? (RCI)
Answer
  • Tells you how happy someone is
  • When the RCI is smaller than 1.96 then there is a significant change
  • Another way to measure SEM
  • Used in clinical contexts to see if there is a difference in treatment
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