The phrase "addition to the questionnaire" is correct and usable in written English.
It can be used when referring to something that is being included or added alongside a questionnaire, such as additional questions or information.
Example: "In addition to the questionnaire, we will also provide a detailed guide to help participants understand the survey."
Alternatives: "supplement to the questionnaire" or "complement to the questionnaire".
This led to a minor addition to the questionnaire.
In addition to the questionnaire, an informal survey in the form of focus group discussion and key informants' interview was employed using checklists to obtain additional supporting information for the study.
In addition to the questionnaire completed by the patients, the treating neurologist filled in a questionnaire covering the clinical headache diagnosis and ever-before intake of five classes of standard prophylactic medication (betablocker, flunarizine, valproate, topiramate, amitriptyline).
In addition to the questionnaire, the proprioceptive drift elicited by the illusion was measured by a standard technique.
In addition to the questionnaire design, a reminder could be included at the beginning of each ACASI session, reminding participants that they are not obliged to answer any question that they find upsetting or inappropriate and may withdrawal from the research at anytime without giving a reason [33].
In addition to the questionnaire survey, all consenting participants provided a 7-mL venous blood sample.
In addition to the questionnaires mentioned in Table 2, additional questions about asthma and rhinoconjunctivitis are included [ 31].
In addition to the questionnaires and Internet Skills scale from Study 1, participants also completed working memory tests, and reading comprehension tasks online.
In addition to the questionnaires, the dates for clinic appointments and number of prescribed ART doses were collected from individual patient records at the clinic.
This study reports on the qualitative analyses of the expectations written by the PHCPs on FMSs in addition to the questionnaire-based items.
In addition to the questionnaires, all study subjects are asked to provide a blood or saliva specimen for DNA analyses.
