APA Tricky Situations: When Should You Capitalize Variables?
- Feb 23
- 1 min read
Updated: Aug 17
February 23, 2026
Brianna Torres
Lead Editor
In many of the quantitative dissertations I’ve edited, clients often get confused about their variables: to capitalize or not to capitalize? APA actually makes this pretty straightforward.
APA mostly uses a “down” style, which means most words are lowercase unless there’s a specific instruction to capitalize them—like proper nouns, titles of assessment scales, or the second part of hyphenated words in headings. The same rule applies to variables: keep them lowercase unless APA gives a reason to capitalize.
There are two cases in APA 7 where variables should be capitalized:
1. When they appear with multiplication signs (e.g., Gender × Race × Age)
2. When variables are derived from a factor or principal components analysis
In all other cases, variable names should stay lowercase. Here are some examples:
Example 1 (no capitalization): In this study, gender, race, and age were operationalized as independent demographic variables in the analysis.
Example 2 (appears with multiplication signs): In this study, Gender × Race × Age was included as a three-way interaction to examine how these variables work together to shape participants’ annual income.
Example 3 (factor analysis): Factor scores representing Academic Motivation, Study Habits, and Time Management were derived from participants’ survey responses and included as continuous predictor variables.
Example 4 (principal components analysis): Principal component scores for Cognitive Ability, Problem-Solving Skills, and Decision-Making Efficiency were derived from participants’ responses to a cognitive task battery and included as continuous predictor variables.
And that’s it, folks! Follow these rules, and your variables will always be APA-perfect.
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