Question

what method obtains self - reported attitudes, opinions, & behaviors? naturalistic observation survey longitudinal study cross - sectional study

Explanation:

Naturalistic observation involves observing subjects in their natural environment without self-reporting. Longitudinal and cross-sectional studies are research designs focused on data collection over time or across groups, not specifically self-reported attitudes/opinions. Surveys directly collect self-reported information from participants via questionnaires or interviews.

Answer:

Survey