Instrument design
This is the landing page for everything related to the measurement instrument used for measuring your constructs of interest. When you use a single item to measure your construct, as is often the case in self-reports, you can think of that single item as your instrument; in that case, the item design page may be most helpful.
The way your instrument is designed, from the number and order of your items to the length of your questionnaire and the answer option design, will directly impact what you measure. Therefore, validating your instrument is crucial to ensure that it consistently measures the intended construct and is appropriate for the context in which it is used.
Below we have specified multiple articles where you can read more about designing your instrument.
Think more about instrument design
Good instrument design takes careful consideration to ensure you measure the construct of interest as adequately as possible.
- [Answer option design]
- Using single item or multiple item measures
- [Questionnaire design]
- [Ordering questions in your questionnaire]
- [Sum or mean scores versus measurement models]