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)

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