In a study on the effects of an oral mouth rinse on gingivitis, some patients start using a new gingivitis toothpaste too.

Quantitative design includes the following except:

Maintaining calibration of the perio scope.

Watching/observing participants:

Which of the following problems would be best approached (studied or analyzed) through the scientific method of inquiry?

Patient has HBP one day and then the next the HBP is normal.

Loss of subjects.

A dental researcher is attempting to put together a questionnaire that incorporates questions on common drugs used in dental practice. She asks a pharmacologist to review the questionnaire in that regard. The pharmacologist is reviewing the questionnaire for:

A quota sampling technique allows for each of the following events to occur in the sampling process except one. Choose the exception.

Which of the following terms relates to the extent to which a test measures what it is intended to measure: