Reliability Quiz

What is reliability defined as?

• The accuracy of measurement tools

• The extent to which test scores reflect true psychological differences

• The consistency of test scores over time

• The ability to predict future performance

According to Classical Test Theory (CTT), what does the observed score consist of?

• True score and variance

• True score and reliability

• True score and bias

• True score and measurement error

What does a reliability coefficient of 0 indicate?

• Perfect reliability

• No correlation between observed and true scores

• No variability in true scores

• High reliability

What is measurement error?

• The difference between observed scores and true scores

• The accuracy of a measurement tool

• The ability to measure psychological traits

• The consistency of test results

What does a high variance in measurement error suggest?

• High reliability

• Accurate psychological assessment

• Poor measurement quality

• Consistent test scores

What is the relationship between observed scores and true scores in terms of reliability?

• They should be identical

• They should reflect true psychological differences

• They are always correlated

• They are independent of each other

What can affect the reliability of a test?

• The time of day the test is taken

• The number of questions in the test

• Only the test design

• Demographic factors and testing conditions

What does a reliability coefficient closer to 1 indicate?

• Lower reliability

• Inconsistent results

• Higher reliability

• No reliability

What is the main focus of Classical Test Theory (CTT)?

• Improving test design

• Estimating reliability for psychological test scores

• Creating new measurement tools

• Analyzing demographic data

What is the effect of random measurement error on test scores?

• It always increases the scores

• It can cancel itself out across respondents

• It has no effect on scores

• It decreases the reliability of the test