Instrument design
This is the landing page for everything related to the measurement instrument used for measuring your constructs of interest. Note that if you use a single item to measure your construct, that item is your instrument (and then the item landing page may be most helpful).
They way your instrument is designed, from the order of your items to the length of your questionnaire, will directly impact what you measure.
Below we have specified multiple articles where you can read more about designing your instrument.
Think more about instrument design
Instrument design
Good instrument design takes careful consideration to ensure you measure the construct of interest as adequately as possible.
- Using single item or multiple item measures
- [Questionnaire design]
- [Ordering questions in your questionnaire]
- [Sum or mean scores versus measurement models]
Instrument Validation
It is important to validate your measurement instrument to check whether it measures what you want it to measure.
- Validation
- [When are my measurements good enough?]
- [Qualitative evaluations of measurement instruments]
- Reliability for single items
- [Reliability for multiple item measures]
- [Face validity for ILD][Content validity for ILD]
- [Predictive, convergent, and divergent validity for ILD]