Kuperczko et al. (2015) conducted correlational research. Which of the following might explain why they conducted correlational research instead of an experiment? Check all that apply.

- It's hard to randomly assign individuals to a particular bedtime or sleep amount.
- You can't randomly assign participants to have a large or small hippocampus.
- Correlational research does a better job of identifying a cause and effect relationship.

Correlational research is chosen when experimental manipulation is not possible due to ethical concerns or unmanipulable variables. It does not establish causality but allows for studying natural behaviors and making predictions based on observed relationships.

Explanation:

Correlational research is conducted when experimental research is not feasible due to variables that cannot be manipulated or ethical concerns. Researchers use correlational designs to study behavior as it occurs naturally, allowing predictions based on relationships observed. However, correlational research cannot establish causality.

In the context of the study by Kuperczko et al. (2015), they might have chosen correlational research over an experiment because certain variables, such as individuals' bedtime or the size of their hippocampus, cannot be randomly assigned. Additionally, correlational research does not do a better job of identifying a cause and effect relationship; only experiments can establish causation.

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