Final answer:
In causal research, data is collected through a controlled experiment. Researchers design the experiment to test a specific hypothesis and collect data to analyze. Conclusions are drawn based on the data analysis to determine the validity of the hypothesis.
Step-by-step explanation:
To collect data through an experiment in causal research, researchers conduct a controlled experiment. They design the experiment to test a specific hypothesis. During the experiment, data is collected and analyzed using statistical, mathematical, and/or graphical methods. From the data analysis, conclusions are drawn to determine if the hypothesis is supported or rejected.