How to Use Case Study in Doctoral Dissertation Research

How to Use Case Study in Doctoral Dissertation Research

A case study is a qualitative (and sometimes mixed-methods) research approach used in doctoral dissertations to examine a real-world “case” in depth within its natural context. Instead of looking for broad generalizations, case study research focuses on detailed understanding of a specific situation, group, program, institution, or phenomenon.

In simple terms, a case study asks: “How and why does this specific case work the way it does in its real-world context?”

What Is a Case Study in Doctoral Research?

A case study is an in-depth investigation of a bounded system, such as:

• A school or university

• A specific program (e.g., online doctoral program)

• A classroom or cohort

• A policy implementation

• A department or organization

It uses multiple sources of data to build a rich, holistic understanding of the case.

Key feature:

The “case” is clearly defined and limited (“bounded”) in time, place, and participants.

When Should You Use a Case Study in a Dissertation?

You should use a case study when your research focuses on:

• Real-world educational or organizational settings

• Complex systems that cannot be easily separated into variables

• Context-dependent problems

• Program evaluation or institutional practices

• “How” and “why” questions

Example research questions:

• How does an online doctoral program support student engagement?

• Why do certain teaching strategies succeed in a specific school?

• How is a new curriculum implemented in a university department?

Case studies are especially strong in education, psychology, business, and public health research.

Types of Case Study Designs

1. Single Case Study

Focuses on one case in depth.

Used when:

• The case is unique or critical

• The case represents a significant example

Example:

A single university’s implementation of a new online learning system.

2. Multiple (Comparative) Case Study

Examines two or more cases.

Used to:

• Compare similarities and differences

• Identify patterns across settings

Example:

Comparing student engagement in two different doctoral programs.

3. Intrinsic Case Study

Focus:

• The case itself is the main interest

• Not designed to generalize

4. Instrumental Case Study

Focus:

• The case is used to understand a broader issue

• Helps explain a general phenomenon

Step-by-Step: How to Use Case Study in a Doctoral Dissertation

Step 1: Define the Case (Bound the Study)

Clearly identify:

• What the case is

• Where it is located

• Who is involved

• Time period of study

Example:

“This case study examined a single online doctoral education program at a U.S. university during the 2025 academic year.”

Step 2: Develop Case Study Research Questions

Case study questions focus on how and why.

Example:

• How does the program support student engagement?

• Why do students persist or withdraw from the program?

Avoid:

• Purely numerical or causal questions like “Does X improve Y?”

Step 3: Select Participants and Data Sources

Case studies use multiple sources of evidence, such as:

• Interviews

• Surveys

• Documents

• Observations

• Institutional data

Sampling is often purposeful, selecting individuals who are directly involved in the case.

Step 4: Collect Multiple Forms of Data (Triangulation)

A key strength of case study research is triangulation—using multiple data sources.

Examples:

• Faculty interviews

• Student focus groups

• Course documents

• LMS analytics

• Policy documents

This improves validity and depth.

Step 5: Analyze the Case Data

Case study analysis focuses on identifying patterns within and across data

sources.

Common approaches:

• Thematic analysis

• Pattern matching

• Explanation building

• Cross-case synthesis (for multiple case studies)

Process:

• Organize data by themes

• Compare data sources

• Identify patterns

• Build explanations of how the case operates

Step 6: Develop a Rich Case Description

The outcome is a thick, detailed description of the case.

This includes:

• Context of the case

• Key actors (students, faculty, administrators)

• Processes and systems

• Key themes and findings

Example:

“The program fostered engagement through structured peer interaction, consistent faculty feedback, and flexible learning design.”

Step 7: Ensure Trustworthiness

Instead of validity/reliability, case studies use:

• Credibility (accuracy of findings)

• Transferability (applicability to other contexts)

• Dependability (consistency of research process)

• Confirmability (minimizing bias)

Techniques include:

• Triangulation

• Member checking

• Audit trails

• Reflexivity

Step 8: Connect Findings to Theory

Link findings to relevant frameworks such as:

• Constructivism

• Organizational theory

• Social learning theory

• Systems theory

This strengthens academic contribution.

Common Mistakes in Case Study Dissertations

Avoid:

• Defining the case too broadly

• Using only one data source

• Treating it like a survey study

• Failing to explain context clearly

• Not justifying case selection

• Ignoring triangulation

Strengths of Case Study Research

• Provides deep, contextual understanding

• Captures real-world complexity

• Flexible and data-rich

• Strong for program evaluation and institutional studies

• Useful for education, psychology, and organizational research

Limitations of Case Study Research

• Limited generalizability

• Time-intensive

• Can be subjective without careful design

• Requires strong data organization

Final Thoughts on How to Use Case Study in Doctoral Dissertation Research

Case study research is a powerful dissertation method for exploring complex real-world systems in depth. It allows doctoral researchers to understand how and why phenomena occur within their natural context, using multiple sources of evidence to build a rich, credible analysis.

A strong case study dissertation is well-bounded, deeply contextual, and evidence-rich, offering insights that go beyond surface-level analysis.

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