Which form of research involves observing natural phenomena without direct interference, often using different people at different ages?

Which form of research involves observing natural phenomena without direct interference, often using different people at different ages?

• A. Cross-sectional research
• B. Longitudinal research
• C. Experimental research
• D. Case study research

Answer: (A)

Cross-sectional research involves observing different people at various ages at roughly the same time and making comparisons, without interfering with participants. This fits the description because you’re watching natural phenomena as they appear across age groups in one snapshot, rather than following the same individuals over time. It contrasts with longitudinal research, which tracks the same people as they age; experimental research, which involves manipulating variables; and case study research, which focuses in depth on a single case or a small number of cases.

Cross-sectional research involves observing different people at various ages at roughly the same time and making comparisons, without interfering with participants. This fits the description because you’re watching natural phenomena as they appear across age groups in one snapshot, rather than following the same individuals over time. It contrasts with longitudinal research, which tracks the same people as they age; experimental research, which involves manipulating variables; and case study research, which focuses in depth on a single case or a small number of cases.