The American Psychological Association style is widely used and accepted for academic writing in the sciences and social sciences. Clarifying connections among ideas is paramount in APA style, which sometimes requires numbering ideas in a list. Numbered lists fall under the “Headings and Seriation” APA guidelines according to the sixth edition of the "Publication Manual of the American Psychological Association."
Determine if your list is of a hierarchical or chronological nature. Lists that don’t have an order or rank of items should be presented in bulleted lists, not numbered ones, according to the APA.
Decide if you would prefer to present the materials in a list form or within the text of a paragraph. If you choose to present the material in the text of a paragraph, you may use letters instead of numbers for each section.
Follow one of the examples below when presenting your materials. If your information does not fit into either of these examples, consider using bullet points or writing the information in prose. Example 1: Numbered list After analyzing the results of the recent study, the American Dental Association recommended the following: 1. Brush your teeth at least twice a day. 2. Ensure that you are using proper technique and do not brush too vigorously. 3. Floss your teeth at least once a day. Example 2: List within paragraph text Following the ADA recommendations, the patients have (a) increased their brushing to twice per day, (b) reviewed and corrected their brushing technique, (c) have begun to integrate flossing into their daily routine.
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- The APA acknowledges that bullets are acceptable alternatives to numbered lists. Numbered lists can give a sense of order for the items, and this implied process is eliminated with the use of bulleted lists. However, you may still use the numbered list system as your default.
- Despite the APA expressly stating that bullets are allowed, some academics do not allow bulleted lists. The theory being that if you are unable to express the ideas in a paraphrase or a summary paragraph, perhaps the materials are better presented in the appendix or a table. Be sure to review any style manuals available for your target audience to be sure that the most recent version of the APA style manual contains all of the required information.