This document discusses qualitative and quantitative methods of data collection. Qualitative methods include interviews and focus groups, which allow for detailed but time-consuming analysis of open-ended responses. Quantitative methods encompass both objective measures of physiological responses and subjective measures using checklists and rating scales, which can be statistically analyzed but restrict responses. Rating scales measure the direction and strength of attitudes using tools like Likert scales, while checklists tally selections to quantify characteristics.