Sample interview questions: Can you discuss your knowledge of classical true score theory and the concept of measurement error?
Sample answer:
Classical True Score Theory
Classical true score theory assumes that observed scores (X) consist of two components:
- True score (T): The underlying, unchanging trait or characteristic being measured.
- Measurement error (E): Random error introduced during the measurement process.
The observed score can be expressed as:
X = T + E
Concept of Measurement Error
Measurement error arises from various sources, including:
- Sampling error: Variability in the sample of items used to measure the trait.
- Context effects: Influences from the testing environment or other situational factors.
- Observer error: Biases or inconsistencies in the administration or scoring of the test.
- Respondent error: Participants’ misunderstanding of the instructions or fluctuations in their attention.
Measurement error is characterized by:
- Randomness: Errors are unpredictable and cancel each other out over multiple measurements.
- Unreliability: Errors make observed scores incon… Read full answer