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Table 2 Data richness scale used during sampling for Ames 2017 [5]

From: Purposive sampling in a qualitative evidence synthesis: a worked example from a synthesis on parental perceptions of vaccination communication

Score Measure Example
1 Very few qualitative data presented. Those findings that are presented are fairly descriptive For example, a mixed methods study using open ended survey questions or a more detailed qualitative study where only part of the data relates to the synthesis objective
2 Some qualitative data presented For example, a limited number of qualitative findings from a mixed methods or qualitative study
3 A reasonable amount of qualitative data For example, a typical qualitative research article in a journal with a smaller word limit and often using simple thematic analysis
4 A good amount and depth of qualitative data For example, a qualitative research article in a journal with a larger word count that includes more context and setting descriptions and a more in-depth presentation of the findings
5 A large amount and depth of qualitative data For example, from a detailed ethnography or a published qualitative article