Yes, you can use abbreviations in tables and figures.All abbreviations used in tables and figures should be defined in the table note or figure caption, respectively, even though the abbreviations will be also be defined in the text if they are used there.
In general, it is not necessary to use abbreviations in the abstract because the abstract is so short.
However, if the abbreviation would help the reader recognize a term or find your article via search, then it is permissible to include an abbreviation in the abstract, even if it is not used three times.
Retain these abbreviations because the reader will need them to retrieve the source (you also do not need to define them—just present them as-is).
See more about this in our post on cite what you see.
If you do use an abbreviation in a running head, you can use it straightaway without definition.
Instead, define the abbreviation the first time you use it in the text.When engaging in technical or academic writing, it is especially important to confirm that abbreviations are correct before using them in a document.Failure to do so may confuse the reader and cast doubt upon the credibility of the document.We recommend that you avoid them—for example, the reader may skim the paper before reading it in full, and abbreviations in headings may be difficult to understand out of context.So, if a term you intend to abbreviate appears in a heading (e.g., the name of a test or measure), spell out the term in the heading and then when it first appears in the text, spell it out again and define it there.Sometimes an abbreviation is presented along with an in-text citation.For example, you might cite a test or measure that has an abbreviation and then provide its citation (for a common case, here is how to cite the ). Writing out the full term in the title will ensure potential readers know exactly what you mean, and if your article is formally published, it will ensure it is accurately indexed.by Chelsea Lee This post will address how to use abbreviations in APA Style—specifically, how to use acronyms, which are abbreviations made up of the first letters of each word in a phrase. You can find abbreviations discussed in the The first time you use an abbreviation in the text, present both the spelled-out version and the short form.When the spelled-out version first appears in the narrative of the sentence, put the abbreviation in parentheses after it: If your reference has a group author, the name of the group can sometimes be abbreviated—for example, American Psychological Association can be abbreviated to APA.And if you have created an identity-concealing label for a participant, use a period after each letter.According to Purdue University's website, the abbreviation for the word "assignment" is ASSG.