How to Write an Abstract: Complete Guide with Examples
Dr. Rachel Thompson
April 20, 2024
13 min read
An abstract is a concise summary of your research that helps readers decide whether to read the full paper. A good abstract can make the difference between your work being read or ignored.
What Is an Abstract?
An abstract is:
- A self-contained summary (150-300 words typically)
- The first thing readers see after the title
- Often the only part people read
- Indexed in databases for searchability
Types of Abstracts
Descriptive Abstract
Describes what the paper contains without revealing findings.
Length: 50-100 words
Use: Humanities, some social sciences
Informative Abstract
Summarizes all key components including results.
Length: 150-300 words
Use: Sciences, most academic papers
Structured Abstract
Uses labeled sections (Background, Methods, Results, etc.)
Length: 200-350 words
Use: Medical and health sciences
Key Components
Background/Context (1-2 sentences)
Why is this research important? What gap does it address?
Purpose/Objective (1 sentence)
What did you set out to do or discover?
Methods (1-2 sentences)
How did you conduct the research?
Results (2-3 sentences)
What did you find? Include key data.
Conclusions (1-2 sentences)
What do the results mean? What are the implications?
Writing Process
Step 1: Write After the Paper
Write your abstract last, after completing your research and paper.
Step 2: Summarize Each Section
Write one sentence summarizing each major section:
- Introduction → Background + Purpose
- Methods → Methods
- Results → Results
- Discussion → Conclusions
Step 3: Combine and Edit
Merge sentences into coherent paragraph(s). Trim unnecessary words.
Step 4: Check Word Limit
Meet the required length (usually 150-300 words).
Step 5: Add Keywords
Include 4-6 keywords that help with database indexing.
Example Abstracts
Sciences Example (Informative)
"Climate change increasingly affects agricultural productivity, yet effects on small-scale farmers remain understudied. This study examined how temperature increases impact rice yields among smallholder farmers in Bangladesh's Sylhet region. Using mixed methods, we surveyed 500 farmers and analyzed yield data from 2010-2020 alongside temperature records. Results showed a 4.2% yield decline for each 1°C temperature increase above 32°C during flowering stages. Farmers with access to irrigation experienced 50% less yield loss than rain-dependent farmers. These findings suggest that climate adaptation strategies must prioritize water access for vulnerable farming communities. Agricultural policy should incorporate irrigation infrastructure investment as a primary climate resilience measure."
(124 words)
Humanities Example (Descriptive)
"This article examines representations of disability in Victorian literature, focusing on works by Charles Dickens and Wilkie Collins. Through close reading and historical contextualization, the analysis explores how physical difference functioned as metaphor and how disabled characters challenged or reinforced contemporary social attitudes. The article argues that these authors' treatment of disability reveals tensions in Victorian conceptions of normalcy, productivity, and social worth. The study contributes to disability studies and Victorian literary scholarship by demonstrating how 19th-century fiction participated in constructing modern understandings of able-bodiedness."
(86 words)
Structured Abstract (Medical)
Background: Depression affects 300 million people globally, but treatment access remains limited.
Objective: To evaluate the effectiveness of a mobile app-based cognitive behavioral therapy (CBT) intervention for mild to moderate depression.
Methods: Randomized controlled trial with 450 participants assigned to app-based CBT (n=225) or waitlist control (n=225). Primary outcome was depression severity measured by PHQ-9 at 8 weeks.
Results: App users showed significantly greater reduction in PHQ-9 scores (mean difference -4.2, 95% CI -5.1 to -3.3, p<0.001) compared to controls. Treatment effects were maintained at 16-week follow-up.
Conclusions: App-based CBT is effective for mild to moderate depression and could increase treatment access in underserved populations.
(120 words)
Common Mistakes
Being Too Vague
Weak: "Results were significant."
Better: "Reading scores improved by 15% (p<0.01)."
Including Too Much Background
The abstract should focus on your research, not extensive context.
Using Jargon
Write for a broad academic audience, not just specialists.
Including Citations
Abstracts typically don't include citations (check your target journal).
Starting with "This paper..."
Jump straight into the content.
Not Matching the Paper
Your abstract must accurately reflect your paper's content.
Discipline-Specific Tips
Sciences
- Include specific data and statistics
- State the methodology clearly
- Emphasize novel findings
Humanities
- Focus on argument and significance
- May be more discursive
- Methodology may be implicit
Social Sciences
- Balance between data and interpretation
- Clearly state research questions
- Include practical implications
Keywords
Select 4-6 keywords that:
- Represent your main topics
- Are terms researchers would search for
- Include both specific and general terms
- Avoid words already in your title
Revision Checklist
- [ ] Covers all essential components
- [ ] Within word limit
- [ ] Can stand alone (makes sense without paper)
- [ ] Free of jargon
- [ ] Includes specific results (if informative)
- [ ] Matches paper content
- [ ] Flows logically
- [ ] Proofread for errors
Conclusion
Your abstract is a miniature version of your paper that must convey purpose, methods, findings, and significance in very few words. Write it carefully—for many readers, it's the only part of your research they'll ever read.
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