HP3804 NTU Psychology Statistics: Module Review (Exploratory Factor Analysis)
Dec 20, 2025 · 13 min read · Note: this post is part of a series of posts regarding HP3804 (Psychological Testing) It’s time to get our hands dirty! As mentioned in the Introduction to Factor Analysis, Exploratory Factor Analysis (EFA) is used when one has no pre-conceived notio...
Join discussionHP3804 NTU Psychology Statistics: Module Review (Using Your Scale)
Dec 20, 2025 · 9 min read · Note: this post is part of a series of posts regarding HP3804 (Psychological Testing) With EFA and CFA done — we finally know how to properly determine the factor structure of a scale. Congratulations! The next question then is of course — how do we ...
Join discussionHP3804 NTU Psychology Statistics: Module Review (Validity of a Scale)
Dec 20, 2025 · 7 min read · Note: this post is part of a series of posts regarding HP3804 (Psychological Testing) With Reliability covered — we can now move on to Validity (also known as accuracy). I’m sure you have seen this picture before illustrating the difference between R...
Join discussionHP3804 NTU Psychology Statistics: Module Review (Confirmatory Factor Analysis)
Dec 20, 2025 · 9 min read · Note: this post is part of a series of posts regarding HP3804 (Psychological Testing) Confirmatory Factor Analysis (CFA), unlike Exploratory Factor Analysis (EFA), is used to prove a factor structure of a scale — meaning that you have to already have...
Join discussionHP3804 NTU Psychology Statistics: Module Review (Introduction to Factor Analysis)
Dec 20, 2025 · 5 min read · Note: this post is part of a series of posts regarding HP3804 (Psychological Testing) Factor Analysis is a methodology to determine the factor structure of the scale. A factor structure comprises of 2 things mainly: The number of factors that a scal...
Join discussionHP3804 NTU Psychology Statistics: Module Review (Reliability of a Scale)
Dec 20, 2025 · 8 min read · Note: this post is part of a series of posts regarding HP3804 (Psychological Testing) What is Reliability? Again—a seemingly innocent and simple question that you think you know the answer to from HP1100. (Spoiler alert: no, you do not HAH) Where doe...
Join discussionHP3804 NTU Psychology Statistics: Module Review (Defining a Construct)
Dec 20, 2025 · 4 min read · Note: this post is part of a series of posts regarding HP3804 (Psychological Testing) What is a construct? A seemingly simple question that we brushed over back in HP1100 — but now, the question haunts us again. When we first started out in Psycholog...
Join discussionHP3804 NTU Psychology Statistics: Module Review (Introduction to Psychometrics)
Dec 20, 2025 · 5 min read · Note: this post is part of a series of posts regarding HP3804 (Psychological Testing) What is Psychometrics (Psychological Testing)? Psychometrics — at its core — is all about measurement. It is the subfield in Psychology devoted to developing reliab...
Join discussionConvergent and Discriminant Validity
Oct 14, 2023 · 6 min read · I've seen several examples lately where there was almost no thought given to the validity of methods in research projects. This post looks at the question from a non-technical perspective. A common pattern for research results in industry is, "We did...
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