Two aspects of the data collection stage of research that show how careful scientists are about data collection are called pretests and:

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Pilot studies are small-scale preliminary studies conducted in order to evaluate feasibility, time, cost, risk, and adverse events involved in a research proposal, which helps in improving the design and methodology of the larger, main study. This, along with pretests, demonstrates the careful planning and consideration scientists put into the data collection process to ensure reliability and validity of their research findings.

Two Aspects of the Data Collection Stage of Research That