Interviewer knowledge of subject status and the hypothesis under study, which could theoretically introduce bias and an overestimation of associations, is unlikely to have introduced significant distortion of the data as the interviews were carried out strictly according to the structured questionnaire.
This study examined the usefulness of a computerized developmental assessment tool, designed to provide investigative interviewers with knowledge about children's understanding of spatial, temporal, numerical, and color terms that may be relevant to the forensic setting.
While logistical reasons prevented us from blinding the interviewers to knowledge of case and control status, identification and enrolment of the cases was not done by the same person who verified the vaccination status.
Below are two examples, the first when the interviewer is probing knowledge: Interviewer: "Could I run through just a short list of things and you can tell me whether anyone ever mentioned these things to you in terms of things to consider before you get pregnant".
For the interviewer, growing knowledge with every subsequent interview allowed her to move away from strict adherence to the interview questions, towards more informal conversation and, if necessary, the examination of some topics in depth.
Flanagan [ 19] also underlines the significance of the interviewer's knowledge concerning the subject in focus.
On the other hand, the interviewer's knowledge of the interviewees and their environment may have enhanced communication [ 20, 21].
The interviewer's knowledge of the field provided a necessary prerequisite for understanding the narratives of the newly educated physicians.
On this data entry screen, the female interviewer recorded (a) the result of the women's eligibility screening, (b) responses to the six randomly selected CVS questions, and (c) comments pertaining to the interviewer's knowledge or observations regarding couple status.
At the time of the telephone interview, the interviewer had no knowledge of the subject or the subject's medical records (including fertility history and treatment outcome).
