Guidance on designing your study.

You need to think carefully about the design of your study and selecting your research methods. Selection of a different research methods will result in different outcome. For example:

  • use a quantitative method if you’re interested in whether something works
  • use a qualitative method if you want to know why or how something works
  • use a mixed method to quantitatively explore whether something works followed by a qualitative investigation of why that is the case

By developing a well-designed study, you’ll be thinking about the type of data you’ll collect for your data analysis.

When designing your study, think about:

  • service user involvement
  • sampling your study population
  • statistical analysis
  • data sharing
  • intellectual property

Research methods

Qualitative, quantitative and mixed-methods research

Qualitative research allows you to understanding how your research topic could potentially be transferred to another context. Your data could be anything from a short response to an open-ended questionnaire question to an hour-long transcribed interview or focus group.

Quantitative research uses numbers, such as routine statistics, to develop your understanding of a research topic. 

Mixed-methods research collects and analyses qualitative and quantitative data within the same study.

Below some resources to help you decide whether a qualitative, quantitative or mixed- methods approach is best for your project.

Questionnaires

Good questionnaire design is important for securing high quality data to enable accurate data analysis. Questionnaires can include:

  • open questions, which typically prompt qualitative data collection and analysis
  • closed questions, which typically prompt quantitative data collection and analysis

If you want to use a questionnaire to collect data, it’s generally recommended that you use a tried and tested or pre-validated questionnaire. These will be have been evaluated to confirm they’re collecting or measuring what they’re intended to; you may have found examples of pre-validated questionnaires when you were reviewing the literature.

Alternatively, below are some sources to assist in developing your own questionnaire.

Service users

Involving service users is now common in all stages of research, not only as research participants but also as researchers. 

INVOLVE is a National Institute for Health Research funded initiative to support active public involvement in NHS research, provides detailed guides on how to involve users in your research.

Sampling

Sampling is used when it’s not possible or practical to include the entire research population in your project. There are many types of sampling including:

  • probability sampling, when you’re seeking a sample that is representative of the wider population
  • random sampling, when every person in the population has an equal chance of being selected
  • purposive sampling, when you rely on your judgment about who will participate in your study

Below are some online guides to find out more about sampling.

Statistical analysis

There are 2 basic types of statistical analysis, descriptive and inferential.

  • Descriptive statistics can help you summarise and describe the results of your research, including basic frequency reporting, numerical calculations, graphs or tables.
  • Inferential statistics make inferences or predictions based on the data you’ve collected.

When it comes to statistical analysis, it may be helpful to get statistical advice as part of your research project. Below are some resources to get you started with statistical analysis:

Pre-registration

It’s increasingly common to pre-register a study, sharing your research plan with the goal of improving the quality and transparency of studies and, in the case of reviews, avoiding duplication.

  • Open Science Framework (OSF) is maintained by the Center for Open Science (COS) and provides a place to document and archive study designs, materials, and data. This is particularly relevant for quantitative studies.
  • PROSPERO: International prospective register of systematic reviews – a place to pre-register your systematic review protocol.
Data sharing

Data sharing aims to facilitate maximum benefits of research data to the widest possible community. The aim behind data sharing is to make your data discoverable for potential reuse while respecting the confidentiality and privacy of research participants. Increasingly, journals, publishers and funding bodies require data underpinning research to be deposited in an accessible repository. More information on data sharing can be found using the below resources.

  • DataCite is a non-profit international organisation building a community around a common standard for identifying and sharing data.
  • Guidance on research data policy by UK Research and Innovation is aimed at Economic and Social Research Council (ESRC) funded projects. This policy is a useful for key issues related to research data including copyright, confidentiality, security and ethics.
Dissemination

It’s important to start thinking about how you plan to disseminate your findings earlier in your project than you might imagine. It will inform other decisions, like what you’ll need to report, the notes you’ll need to keep to inform that reporting, and the level of detail you’ll be expected to present.

The Enhancing the QUAlity and Transparency Of health Research (EQUATOR) Network provides a comprehensive set of reporting guidelines you can follow for most study designs.

If you’re writing a book or journal article, you’ll need to think about the type of access you want for your work. Are you planning to submit to a publisher, perhaps one working with a professional association who uses its revenue to fund professional activities?

This is likely to mean a period of subscriber-only access to your work to protect the income stream. Alternatively, are you planning on publishing in an open access journal that makes content available immediately but may require upfront funding from you?

If your project received external funding there may be funder expectations to make your findings available through open access.

Plan S advocates for all publicly funded projects to be published in open access journals.

SHERPA Juliet lists the open access requirements of over 150 worldwide funding bodies.

Open access publishing

There are a variety of open access options available when disseminating your findings including self-archiving.

Intellectual property (IP)

The NHS seeks to develop innovations that can lead to improved interventions and better services for health and social care. These innovations are covered by the term intellectual property (IP).

Suggested reading

Page last reviewed: 22 August 2023
Next review due: 22 August 2024