Table Of ContentAmerican Psychological 
Association (APA) Writing 
Format 
Information Provided By: 
American Psychological Association (2010). 
Concise rules of APA style, 6th edition. 
Washington DC: American Psychological 
Association.
General Writing Rules 
Goal in writing a research paper is to have 
clear, precise, and logical communication. 
Writing a research paper is much different 
than writing a creative paper. 
– LESS IS MORE in a research paper. Meaning 
that you want to write concise and simple 
sentences and remove extraneous words and 
details.
Headings 
Headings help the reader anticipate key points and track 
the development of your argument. 
Five Levels: 
– Level 1: Centered, Boldface, Upper/Lowercase Heading 
– Level 2: Flush Left, Boldface, Upper Lowercase Heading  
– Level 3: Indented, boldface, lowercase paragraph 
heading ending with a period. 
– Level 4: Indented, boldface, italicized, lowercase 
paragraph heading ending with a period.  
– Level 5: Intended, italicized, lowercase paragraph heading 
ending with a period.  
Rule: Be sure to have at least two sub-section headings 
and sub-sections within in a section, just like in an 
outline (e.g., you can divide a section numbered I into A 
and B; just an A sub-section cannot stand alone).
Heading Example 
Depression in Older Adults (Level 1) 
 
Introductory text… (there is no heading for “Introduction) 
Symptoms of Depression (Level 2) 
  Somatic symptoms. (Level 3) 
  Changes in appetite. (Level 4) 
  Changes in sleep. (Level 4) 
  Cognitive symptoms. (Level 3) 
  Negative thoughts. (Level 4) 
  Perseverative thoughts. (Level 4) 
Treatment Options (Level 2) 
  Therapy (Level 3) 
  Cognitive-behavioral therapy. (Level 4) 
  Person-centered therapy. (Level 4) 
  Medications (Level 3) 
  Selective-serotonin reuptake inhibitors. (Level 4) 
Conclusion (Level 2)
Seriation Options 
Seriation helps organize key points of sections, 
paragraphs, and sentences.  
Rule 1: Separate paragraphs in a series, such as 
steps in a procedure, are identified by an Arabic 
numeral following by a period but not enclosed 
or followed by parentheses.  
Rule 2: Separate sentences in a series are also 
identified by an Arabic numeral followed by a 
period; the first word is capitalized, and the 
sentence ends with a period or correct 
punctuation.
Seriation Continued 
Example of Rule 2: 
– Using the learned helplessness theory, we predicted 
that the depressed and nondepressed participants 
would make the following judgments of control: 
  1. Individuals who… (paragraph continues). 
  2. Nondepressed persons exposed to… (paragraph 
continues). 
  3. Depressed persons exposed to… (paragraph 
continues). 
Numbered lists may connote an unwarranted 
ordinal position or order. If you do not want to 
communicate ordinal status of items, use bullets.
Seriation Continued 
Rule 3: Within a paragraph or sentence, identify 
items in a series by lowercase letters in 
parentheses. 
– Caveat: If the items in the list have internal commas, 
use semicolons to separate items.  
Examples of Rule 3: 
– The participant’s three choices were (a) working with 
another participant, (b) working within a team, and 
(c) working alone.  
– We tested three groups: (a) low scorers, who scored 
fewer than 20 points; (b) moderate scorers, who 
scored between 20 and 50 points; and (c) high 
scorers, who scored more than 50 points.
Transitional Words and Phrases 
Time Links  Additional Links 
 
– Then  – In addition 
– Next   – Moreover 
– After  Contrast Links 
– While 
– But 
– Since 
– Conversely 
Cause-Effect Links 
 – Nevertheless 
– Therefore  – However 
– Consequently  – Although 
– As a result
Active vs. Passive Voice 
Research papers are always written in ACTIVE 
voice. 
– Active Voice: In an active sentence, the subject 
is doing the action. A straightforward example is 
the sentence "Steve loves Amy." Steve is the subject, 
and he is doing the action: he loves Amy, the object 
of the sentence. 
– Passive Voice: In passive voice, the target of the 
action gets promoted to the subject position. 
Instead of saying, "Steve loves Amy," I would say, 
"Amy is loved by Steve." The subject of the sentence 
becomes Amy, but she isn't doing anything. Rather, 
she is just the recipient of Steve's love. The focus of 
the sentence has changed from Steve to Amy.
Verb Tenses 
Introduction/Literature Review 
– Past tense – Smith and colleagues showed… 
– Present perfect tense – Researchers have 
shown…. 
Results 
– Past tense – Anxiety decreased significantly…  
Conclusion/Discussion 
– Present tense – The results of Experiment 2 
indicate…
Description:To separate elements in a series that already contain commas. ▫ Example: The color order was red, yellow blue; blue, yellow, red; or yellow, red, blue. ▫ Colon. – Used between a grammatically complete introductory clause. (one that could stand as a sentence) and a final phrase or clause that