Face-to-face questionnaires, delivered by an emailed hyperlink, offer greater control because most people read and (hopefully) respond to their own emails.

Researcher-completed questionnaires will usually have a higher response rate than self-completed questionnaires.

A valid questionnaire will not enable accurate data that actually measure the concepts you are interested in to be collected.

The advice is to evaluate all possible data collection methods and to choose those most appropriate to your research question(s) and objectives.

Opinions, data that cannot be collected using questionnaires.

Descriptive research, such as that undertaken using attitude and opinion questionnaires and questionnaires of organisational practices, cannot enable you to identify and describe the variability in different phenomena.

You can prompt and explore issues further with in-depth and semi-structured interviews, this will not be possible using questionnaires.

When writing your project report you will be expected to state your response rate.

To generalise research results about a population, the sample needs to be as representative as possible.

Self-administered questionnaires are usually completed by researchers.