Dictionary
Cronbach’s Alpha: Measuring Internal Consistency
Explore Cronbach's alpha, the foundational psychometric metric for internal consistency reliability, including its formula, history,...
# Classical Test Theory
21 results
Dictionary
Aggregation: Principles and Behavioral Measurement
Aggregation is the psychometric and statistical practice of combining multiple behavioral observations, item responses, or...
October 6, 2026
•
Dr. Mohammed Looti
Dictionary
Additive Scale: Principles and Measurement
An additive scale is a psychometric composite instrument that combines individual item scores into a...
October 6, 2026
•
Dr. Mohammed Looti
Dictionary
Additive Models: Understanding Linear Effects
Explore the concept of additivity in psychology, statistics, and psychometrics. Learn its definitions, history, theoretical...
October 6, 2026
•
Dr. Mohammed Looti
Scales
Computational Thinking Test for Lower Primary (CTtLP)
The Computational Thinking Test for Lower Primary (CTtLP) is a 27-item psychometric assessment developed by...
September 27, 2026
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Dr. Mohammed Looti
Theories
Generalizability Theory – Lee Cronbach
A comprehensive academic guide to Lee Cronbach's Generalizability Theory, exploring variance partitioning, G-studies, D-studies, and...
September 6, 2026
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Dr. Mohammed Looti
Theories
Classical Test Theory (True Score Theory) – Charles Spearman & Harold Gulliksen
A comprehensive academic analysis of Classical Test Theory, exploring its mathematical foundations, axiomatic assumptions, and...
September 5, 2026
•
Dr. Mohammed Looti
Theories
Alpha Reliability Index Theory – Lee Cronbach
A comprehensive academic analysis of Lee Cronbach's Alpha Reliability Index Theory, examining its mathematical derivation,...
September 5, 2026
•
Dr. Mohammed Looti
Scales
Best Practices for Developing and Validating Scales (Primer)
A comprehensive academic analysis of the nine-step psychometric scale development and validation framework authored by...
September 4, 2026
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Dr. Mohammed Looti