Final answer:
In-depth interviews provide richer discussions, deeper insights, and less conformity pressure, but client involvement is not an exclusive advantage, and scheduling respondents may actually be more challenging than for focus groups.
Step-by-step explanation:
The advantages of in-depth interviews over traditional focus groups are numerous. Most notably, they allow for a richer discussion of sensitive topics, provide deeper insights about underlying motives, and entail less social pressure to conform to group opinions. In-depth interviews enable the interviewer to delve into complex issues, giving respondents the freedom to answer without the constraints of preselected options. This leads to qualitative data that can be much more varied and insightful than data collected from traditional focus groups.
However, client involvement is not inherently an advantage of in-depth interviews over focus groups. Both methodologies can be structured to include or exclude client involvement depending on the research design. The element that does not serve as an advantage is the scheduling of respondents, as this can be a challenging aspect of conducting in-depth interviews compared to organizing a group session at a single date and time.