UR
Diary Studies
A practical longitudinal research method for understanding habits, routines, and how experiences evolve over time.
How to use diary studies to capture behaviour, context, and experience across days or weeks instead of a single moment.
Quick take
If you need to understand behaviour over time, not just in a single session, use diary studies.
Related Services
What it is
Diary studies are a qualitative UX serviceUser ResearchUnderstand user behaviour, validate ideas, and make clearer product decisions with evidence you can act on.Open service method used to capture glossaryUser BehaviourUser behaviour refers to how users interact with a product, including actions, patterns, and decision-making processes.Open glossary term, experiences, and glossaryInteractionInteraction refers to any action a user takes within a product and how the system responds. It includes clicks, taps, gestures, and inputs that drive the user experience.Open glossary term over a period of time.
Participants record their own activities, thoughts, and glossaryContextThe surrounding conditions that shape behaviour and decisions.Open glossary term as they happen, usually through glossaryPromptA prompt is the input or instruction given to an AI system to guide its output or response.Open glossary term, tasks, or structured entries.
Unlike interviews or guideUsability TestingObserving users complete tasks to identify usability issues, friction, and barriers to success.Open guide, diary studies focus on longitudinal glossaryBehaviourBehaviour refers to how users interact with a system, including actions, patterns, and responses.Open glossary term. They show how experiences change across days, weeks, or longer.
The goal is to understand glossaryPatternA reusable solution to a common design problem.Open glossary term, habits, and real-life usage that cannot be captured in a single glossarySessionA session is a single period of user interaction with a product, from entry to exit within a defined timeframe.Open glossary term.
Diary studies are useful when you need to see how behaviour develops over time rather than how it looks in one isolated session.
When to use it
Use this method when glossaryBehaviourBehaviour refers to how users interact with a system, including actions, patterns, and responses.Open glossary term unfolds over time.
It is most useful when:
It is less useful when:
Diary studies are often used alongside interviews and analytics to provide both depth and continuity.
Key takeaway
Use diary studies when understanding change, repetition, and long-term behaviour matters more than a single snapshot.
How to run it
Set up properly.
Before you start, be clear on what glossaryBehaviourBehaviour refers to how users interact with a system, including actions, patterns, and responses.Open glossary term or experiences you want to capture, how long the study should run, and how participants will record entries.
Define a simple structure so participants know what to capture without overloading them.
Run the method.
Diary studies rely on participant input, so glossaryClarityClarity is how easily users can understand what is happening and what they need to do.Open glossary term and glossaryConsistencyConsistency is the use of uniform patterns, behaviours, and visual elements across a product to create familiarity and predictability. It helps users learn once and apply that knowledge throughout the experience.Open glossary term matter.
Provide clear instructions and expectations. Use glossaryPromptA prompt is the input or instruction given to an AI system to guide its output or response.Open glossary term to guide entries. Keep tasks simple and manageable. Check in periodically to maintain glossaryEngagementEngagement refers to how users interact with a product, content, or experience, including actions like clicks, time spent, and interactions.Open glossary term. Allow flexibility so glossaryBehaviourBehaviour refers to how users interact with a system, including actions, patterns, and responses.Open glossary term remains natural.
Typical glossaryPromptA prompt is the input or instruction given to an AI system to guide its output or response.Open glossary term: What did you do. What were you trying to achieve. What went well or badly. What frustrated you. What would you expect next.
Avoid making the glossaryProcessA process is a defined sequence of steps used to achieve a specific outcome.Open glossary term too complex or time-consuming.
Capture and make sense of it.
The value comes from identifying glossaryPatternA reusable solution to a common design problem.Open glossary term over time.
Look across entries to identify recurring glossaryBehaviourBehaviour refers to how users interact with a system, including actions, patterns, and responses.Open glossary term and routines, changes in behaviour or perception, glossaryPain PointA specific problem or frustration users experience when trying to complete a task.Open glossary term across different moments, and differences between participants.
Analysis often involves grouping entries and mapping glossaryBehaviourBehaviour refers to how users interact with a system, including actions, patterns, and responses.Open glossary term over time.
What to look for
Focus on:
Where it goes wrong
Most issues come from:
If participation drops off, the quality of glossaryInsightAn insight is a meaningful understanding that explains why something is happening and what it means.Open glossary term drops with it.
What you get from it
Done properly, this method gives you:
Key takeaway
It reveals how experiences evolve, not just how they start.
Get in touch
If this sounds like something you need, we can help you understand how your users behave over time, not just in isolated moments.
No guesswork. No assumptions. Just clear glossaryInsightAn insight is a meaningful understanding that explains why something is happening and what it means.Open glossary term you can act on.
FAQ
Common questions
A few practical answers to the questions that usually come up around this method.
What are diary studies in UX?
Diary studies are a serviceUser ResearchUnderstand user behaviour, validate ideas, and make clearer product decisions with evidence you can act on.Open service method where participants record their glossaryBehaviourBehaviour refers to how users interact with a system, including actions, patterns, and responses.Open glossary term and experiences over time.
When should you use diary studies?
Use them when glossaryBehaviourBehaviour refers to how users interact with a system, including actions, patterns, and responses.Open glossary term spans multiple glossarySessionA session is a single period of user interaction with a product, from entry to exit within a defined timeframe.Open glossary term or when you need to understand habits and long-term glossaryEngagementEngagement refers to how users interact with a product, content, or experience, including actions like clicks, time spent, and interactions.Open glossary term.
How long should a diary study run?
Typically between one and four weeks, depending on the glossaryBehaviourBehaviour refers to how users interact with a system, including actions, patterns, and responses.Open glossary term being studied.
What is the difference between diary studies and interviews?
Diary studies capture glossaryBehaviourBehaviour refers to how users interact with a system, including actions, patterns, and responses.Open glossary term over time, while interviews capture reflection at a single point.
Are diary studies reliable?
They can be highly valuable, but rely on participant glossaryConsistencyConsistency is the use of uniform patterns, behaviours, and visual elements across a product to create familiarity and predictability. It helps users learn once and apply that knowledge throughout the experience.Open glossary term and clear guidance.