Participants reported at 6:00AM to the research lab for extra credit participation in a research study. Participants stayed in the research lab until 10:00PM with only two 15-minute breaks. The researchers should be most concerned with:

Question

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The researchers should be most concerned with fatigue effects, as the participants were in the lab for an extended period of time without adequate breaks. Fatigue can affect cognitive and physical functioning, leading to poorer performance on tasks and potentially confounding results. Maturation, order effects, and practice effects are not as relevant in this scenario.

Participants Reported at 6:00AM to the Research Lab for Extra