The process not needed in experimental research is

Experimental research does not need reference collection alone as its source of data.

Observation is essential, as effects on the dependent variable must be watched.

Manipulation and replication are core, one alters the cause and the other confirms results.

Controlling extraneous variables is indispensable to isolate the true effect.

Relying only on references gathers secondary material, not fresh experimental data.

Experiment generates primary data through active intervention, not literature alone.