Are you looking for a quick yet precise guide on how to create a codebook for your next qualitative research project?
Then you’ve hit the jackpot with this article!
In this post, I’ll explain what a codebook is (in case you’re unfamiliar with it), guide you step by step through the creation process without overwhelming you, and even share how you might be able to skip most of the effort altogether while improving the validity of your qualitative data analysis.
What is a Codebook?
Before we dive in, let’s clarify that we are discussing codebook creation within qualitative research. That means that the data you will be analysing can be interview transcripts, documents, reports, videos, social media postings, and so on.
A codebook is essentially a coding manual that provides structured guidelines for assigning categories which represent broader thematic groupings to units of analysis within a qualitative dataset. Each category or theme consists of specific codes, which serve as labels for classification.
Using a codebook is more common in research projects that analyze qualitative data, but do so from a more quantitative perspective. I’ll explain what this means in a second.
In “hardcore” interpretive qualitative studies, for example when using Glaser’s grounded theory approach or Braun and Clarke’s reflexive thematic analysis, a codebook can also be used—but its purpose here is a little different.
Let’s start with the “quantitative” way of analyzing qualitative data. This is done in methods such as quantitative content analysis or deductive thematic analysis. I’ve made tutorials for both of these methods, so please feel free to check them out.
In a quantitative content analysis, you assign small bits of your qualitative data to certain categories. In the case of this method, you do not develop these categories yourself. Instead, you define them prior to your analysis. And how do you do that?
With a codebook!
The codebook contains all categories and descriptions of the categories, specifying how units of analysis (e.g., sentences, tweets, or images) should be classified.
The codebook may also define a numerical value (an ID) that you can assign per category: Category 1, category 2, category 3, and so on.
Example of a Codebook
Let’s look at a concrete example to make this clearer. Imagine we want to analyze tweets about COVID-19, specifically focusing on misinformation as part of our research question.
A codebook designed for this study would need to contain various categories of misinformation commonly found on social media.
Here’s an example from an actual codebook by Memon & Carley (2020):

The authors defined 16 categories into which they classified their material.
For each category, the codebook provides:
- A detailed description
- Examples
- Justifications for why a particular example was classified under that category
Creating Your Own Codebook
You should only create a new codebook if, after thorough screening of the literature, you can’t find an existing one that suits your study or can be adapted to your needs.
Structure of a Codebook
A codebook, much like a scientific paper, should be well-structured for clarity. If necessary, include a table of contents for easy navigation.
Here’s a suggested structure:
#1 Introduction
A brief paragraph explaining:
- The context in which the codebook was developed
- What it is suitable for
- Whether it builds upon an existing codebook (if so, specify which one)
- The dataset used to develop the codebook
#2 Overview of Categories
Include a table summarizing all categories. Sometimes a codebook could have two levels, with categories and subcategories or main codes and sub-codes. Whether you call it codes, categories, or themes depends on the method. In content analysis researcher typically refer to categories, in thematic analysis it’s themes and so on. This means, if you are creating your own codebook, you should stick with the vocabulary of the method you want to apply the codebook to.
#3 Description of Categories
Categories can originate in two ways:
- From existing literature or a previously established codebook
- In this case, provide the citation.
- Developed based on your own dataset
- If you identify a new category during your analysis, you can add it to the codebook.
Each entry in the codebook should consist of:
- Title of the Category
- Description in your own words, explaining what the category represents and the conditions under which this category applies
- Corresponding sub-categories that might be part of this category and what they represent
- Unit of analysis (e.g., tweet, comment, video, text snippet)
- At least one example (preferably several) from a real dataset
- Explanation of why the example(s) were assigned this category or sub-category
For points 5 and 6, you can use a table format similar to the linked example. The key is to keep the codebook as clear and structured as possible for ease of use.
#4 References
Finally, list all sources used in your codebook, just as you would in any scientific work.

Using an Existing Codebook
Creating a new codebook from scratch can be time-consuming. That’s why it’s worth checking for existing codebooks first.
Where to Find Existing Codebooks
- Open-Science Databases: Many researchers share datasets and resources, including codebooks, to support the academic community. Examples:
- Zenodo
- OSF (Open Science Framework)
- Contacting Authors: If a paper references a codebook but doesn’t provide it in an appendix, try emailing the authors. Researchers often appreciate interest in their work and may be happy to share their codebook.
- Adapting a Codebook: If you find a relevant codebook, you can modify it to fit your study. However, make sure to cite the original source and document any changes you made. If you include your adapted codebook in an appendix, provide a detailed explanation of modifications.
Codebooks in Inductive Qualitative Research
In the beginning, I mentioned that codebooks may also be used in inductive qualitative research, such as Glaserian grounded theory or reflexive thematic analysis.
The main difference here is that you are not looking for pre-defined categories. Instead, you start with a blank canvas and create all categories based on your data. The codebook is simply a tool to document your categories. This will help you and others (such as collaborators or reviewers) to better understand how the categories were built. You are essentially creating a documentation of all your categories and examples. But in contrast to quantitative content analysis and deductive thematic analysis, you are doing it during and after the analysis rather than before.
Final Thoughts
A well-structured codebook is essential for conducting research that aims to assign qualitative data to predefined categories or themes.
Whether you create one from scratch or adapt an existing codebook, being systematic, clear and consistent is key to ensuring valid and replicable results.