Which research method is used to identify cause-effect relations and test possible explanations for effects?

Experimental research identifies cause-effect relations and tests explanations for effects.

It manipulates an independent variable while controlling other factors.

Random assignment lets researchers infer causation with confidence.

Correlational research shows association but cannot establish causation.

Ethnography describes cultural life through immersion, not causal testing.

Case studies explore single instances in depth without controlled manipulation.