| Cross-sectional, quantitative design (N = 25) . | Qualitative design (N = 15) . | Mixed-method design (N = 3) . | RCTa (N = 5) . |
|---|---|---|---|
| Online survey (n = 15), Paper questionnaire (n = 5), Mail survey (n = 2), Computer-assisted, face-to-face omnibus survey (n = 1), Telephone survey (n = 1), Computer Assisted Telephone Interview (n = 1) | Semi-structured Interviews (n = 6), Focus groups (n = 5), Retrospective textual analysis (n = 3), Combination of focus groups and interviews (n = 1) | Interviews and paper-based questionnaire (n = 1), Semi-structured interviews and online surveys (n = 1), Online survey and structured focus groups (n = 1) | Paper questionnaire (n = 1), Online survey (n = 3), Modified version of the nutrition try-day taste-testing ballot74 (n = 1) |
| Cross-sectional, quantitative design (N = 25) . | Qualitative design (N = 15) . | Mixed-method design (N = 3) . | RCTa (N = 5) . |
|---|---|---|---|
| Online survey (n = 15), Paper questionnaire (n = 5), Mail survey (n = 2), Computer-assisted, face-to-face omnibus survey (n = 1), Telephone survey (n = 1), Computer Assisted Telephone Interview (n = 1) | Semi-structured Interviews (n = 6), Focus groups (n = 5), Retrospective textual analysis (n = 3), Combination of focus groups and interviews (n = 1) | Interviews and paper-based questionnaire (n = 1), Semi-structured interviews and online surveys (n = 1), Online survey and structured focus groups (n = 1) | Paper questionnaire (n = 1), Online survey (n = 3), Modified version of the nutrition try-day taste-testing ballot74 (n = 1) |
RCT, randomized controlled trials (n = 4), randomized cross-over trial (n = 1).
| Cross-sectional, quantitative design (N = 25) . | Qualitative design (N = 15) . | Mixed-method design (N = 3) . | RCTa (N = 5) . |
|---|---|---|---|
| Online survey (n = 15), Paper questionnaire (n = 5), Mail survey (n = 2), Computer-assisted, face-to-face omnibus survey (n = 1), Telephone survey (n = 1), Computer Assisted Telephone Interview (n = 1) | Semi-structured Interviews (n = 6), Focus groups (n = 5), Retrospective textual analysis (n = 3), Combination of focus groups and interviews (n = 1) | Interviews and paper-based questionnaire (n = 1), Semi-structured interviews and online surveys (n = 1), Online survey and structured focus groups (n = 1) | Paper questionnaire (n = 1), Online survey (n = 3), Modified version of the nutrition try-day taste-testing ballot74 (n = 1) |
| Cross-sectional, quantitative design (N = 25) . | Qualitative design (N = 15) . | Mixed-method design (N = 3) . | RCTa (N = 5) . |
|---|---|---|---|
| Online survey (n = 15), Paper questionnaire (n = 5), Mail survey (n = 2), Computer-assisted, face-to-face omnibus survey (n = 1), Telephone survey (n = 1), Computer Assisted Telephone Interview (n = 1) | Semi-structured Interviews (n = 6), Focus groups (n = 5), Retrospective textual analysis (n = 3), Combination of focus groups and interviews (n = 1) | Interviews and paper-based questionnaire (n = 1), Semi-structured interviews and online surveys (n = 1), Online survey and structured focus groups (n = 1) | Paper questionnaire (n = 1), Online survey (n = 3), Modified version of the nutrition try-day taste-testing ballot74 (n = 1) |
RCT, randomized controlled trials (n = 4), randomized cross-over trial (n = 1).
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