Research methods

Research methods

This guide provides information on research design and methods in pharmacy, including their key principles, strengths and limitations.

Published: 12 September 2022

Updated: 25 October 2022

This was published when the organisation was the Royal Pharmaceutical Society.


Possessing a basic understanding of the scientific basis and rationale behind the choice of methods is important for individuals leading and designing studies and those supporting delivery (e.g., through recruitment of participants or collecting data). Study design can greatly impact on the validity of the research findings, so it is important to select the most appropriate design.

Key points covered in this guide

  • The principles of research design (strengths and limitations) and the importance of having a plan that addresses the research question.

  • An overview of different types of methods and their main features.

  • The key principles and procedures in quantitative and qualitative research, and what to consider when collecting, analysing and interpreting data.

Research design and methodology

Once you have developed your research question and given some thought to your aim(s) and objectives, the next stage is to choose a suitable research design and methodology (and methods).

Methodology is a broad term that encompasses:

  • The choice of method(s) used to gather data to answer a research question.
  • The rationale for your choices, including strengths and weaknesses and potential challenges.

Method encompasses the details of carrying out the research, including how you will select the sample, or how you will collect and analyse the data.

You will probably be aware of some of the more common methods used in pharmacy practice research but may be unclear on what method to use for your own project. You can learn a lot about different methodologies and methods through other people’s research, so you should take a look at the existing literature and evidence on your topic.

Study design is about ensuring that the research question can be answered in an objective and valid way. The method refers to the specific technique(s) used to generate the data with which to answer the research question.

Overview of methodologies

Research methods can be broadly categorised as quantitative or qualitative.

Whatever method(s) you choose, your approach should be driven by your research question and not by what is possible to measure. You should also be clear on how each component of the study contributes to the end result.

Quantitative methods

Mainly expressed in numbers

  • Used to answer a ‘how much’, ‘how many’, ‘how often’ question (i.e. used to generate numerical data or data that can be converted into numbers).
  • Used to quantify, measure, count, estimate and compare.
  • Can deal with very large datasets (e.g. big data, such as prescription data).
  • Can statistically test theories and hypotheses.

There is a range of quantitative methods you can choose from (e.g. surveys/questionnaires, randomised controlled trials, cohort studies, etc.), each generating a different type of data. The choice of method should, therefore, be driven by your research question, and not by what is possible to measure.

Find out more about quantitative research here.

Qualitative methods

Mainly expressed in words

  • Used to explore and answer a ‘’what’, ‘why’ or ‘how’ question.
  • Used to understand and explain people’s views, experiences and behaviours.
  • Can inform a poorly understood subject area.
  • Can ask broader questions and collect context-specific data for a deeper insight in a topic.

There is a range of qualitative methods you can choose from (e.g. focus groups, interviews, etc.), but they usually involve direct interaction with participants, individually or in a group setting. Similar to quantitative research, the choice of method should be driven by your research question.

Find out more about qualitative research here.

Mixed methods

Combine both qualitative and quantitative approaches in one study.

By combining both research methods, the research has the potential to achieve deeper insights than using a single method alone.

Example: 

You carried out a quantitative survey to investigate views and experiences from your colleagues on a new service. The survey included a question related to the challenges of providing the new service. Time, resources and training were identified as challenges by respondents. You would like to find out more, so you conduct two focus groups to explore these identified challenges in more detail.

There are four main types of mixed-method research designs:

TriangulationQualitative and quantitative methods are used with equal weight and data collected at the same time, in parallel. Typically, after separate data collection, the researcher draws together the different types of data during analysis and interpretation to determine if the findings of the method are complementary.
Concurrent/EmbeddedThis study design is used when there is one primary data type that is supported by another secondary data type. Qualitative and quantitative data are collected at the same time, for example, a primarily qualitative study that involves numerical data collection for a single question within a questionnaire.
ExplanatoryCollection and analysis of qualitative data occurs after collection and analysis of quantitative data, typically are used to help explain and interpret quantitative results.
ExploratoryCollection and analysis of qualitative data occurs before collection and analysis of the quantitative data. This method is often used when there is little initial guiding framework, for example, the variables to be measured are not yet known, or the research intends to examine a newly emerging theory.

One-to-one support

Monday-Friday, 9am to 5pm
We’ll answer your questions, provide reliable professional advice, and point you towards the most up-to-date pharmaceutical information.

Did this learning help your CPD?

Don’t forget to record it in your MyCPD Revalidation
e-Portfolio.

Share your suggestions

Submit an idea for learning content, events, guidance or resources.