_______ research designs focus on collecting in-depth information from a relatively small number of participants.

Qualitative research designs are specifically structured to gather in-depth insights and a rich understanding of participants' experiences, feelings, and behaviors. This approach prioritizes the depth of information over breadth, often involving smaller sample sizes to facilitate detailed exploration of complex phenomena. In qualitative research, methods such as interviews, focus groups, or open-ended surveys are typically employed, allowing the researcher to delve deeply into participants' perspectives and obtain contextual data that can illuminate intricate issues.

On the other hand, quantitative research designs focus on numerical data and statistical analysis, which often require larger sample sizes to ensure generalizability of findings. Survey designs typically aim for standardized data collection that can efficiently gather responses from many participants for comparative analysis. Experimental designs are structured to investigate cause-and-effect relationships, often in controlled conditions, and also necessitate larger samples to establish statistical significance. Thus, qualitative research stands out as the approach dedicated specifically to obtaining comprehensive, nuanced insights from a smaller group of participants.