Essential Research Methods: Quantitative, Qualitative, Mixed
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Research Methods Cheat Sheet
1. Quantitative Research
Purpose: To measure variables, test hypotheses, and generalize findings using numerical data.
Key Features
- Uses large, statistically significant samples
- Employs structured tools like surveys, experiments, or questionnaires
- Focuses on “how many,” “how often,” or correlations between variables
- Analysis is statistical
Strengths
- Standardized and replicable
- Can generalize findings
- Allows identification of patterns and trends
Limitations and Potential Biases
- May miss context or personal experiences
- Small sample sizes or poor sampling methods can introduce bias
- Cannot always answer “why” or “how” questions
2. Qualitative Research
Purpose: To examine experiences, perceptions, and meanings.
Key Features
- Uses interviews, focus groups, observations
- Provides rich, in-depth data
- Examines the “why” or “how” of behaviors or experiences
Strengths
- Captures context and human perspective
- Can uncover unexpected insights
- Flexible and exploratory
Limitations and Potential Biases
- Smaller sample sizes, limited generalizability
- Risk of researcher bias in interpretation
- Data can be subjective
3. Mixed Methods Research
Purpose: To combine quantitative and qualitative approaches.
Key Features
- Uses numerical data AND open-ended, descriptive data
- Helps validate findings through triangulation
Strengths
- Reduces bias by using multiple methods
- Provides both breadth and depth
- Improves confidence in findings
Limitations and Potential Biases
- More complex design and analysis
- Can be time-consuming and resource-intensive
4. Key Concepts in Research
| Concept | Definition |
|---|---|
| Reliability | Consistency of a measure over time (test-retest, internal consistency, inter-rater) |
| Validity | The extent to which a study measures what it intends to measure |
| Triangulation | Using more than one method to study the same phenomenon to increase confidence in results and reduce bias |
| Confidentiality | Protecting participant identities through methods like code names, anonymous surveys, and secure data storage |
5. Ethical Principles in Social Research
- Informed consent: Participants must know the purpose, risks, and their right to withdraw
- Minimize harm: Avoid psychological, physical, or social harm
- Confidentiality: Protect participants’ identities and sensitive information
- Use appropriate methods: Match methodology to research question
- Independent oversight: Use IRB or equivalent to review study design
- Transparency: Report results accurately and objectively
Quick Tips
- Quantitative = numbers, patterns, trends
- Qualitative = stories, context, meanings
- Mixed = combine for strongest insight
- Always protect participants ethically