Here are the APA capitalisation rules
- Capitalise formal names of tests (Exercise Stress Echo).
- Capitalise major words and all other words of four letters or more, in headings, titles, and subtitles outside reference lists, for example, “A Study Into how Everything Works.”
- Capitalise names of conditions, groups, effects, and variables only when definite and specific. (Group B was the control group)
- Capitalise specific course and department titles (USM Department of Theology), but do not capitalise when referring to generalities (the department, the theology course).
- Do not capitalise generic names of tests (echo test for exercise stress).
- Do not capitalise names of laws, theories, and hypotheses (the law of conservation of mass)