In a well-controlled experiment, an educational psychologist randomly assigned two groups of students to study the same list of words. One group studied for 10 minutes, and a second group studied the same list for 5 minutes. The group studying for 10 minutes later recalled significantly more words than the 5-minute-study group. The MOST appropriate conclusion that can be drawn from this research is that more study time:

Question

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The experiment was well-controlled, meaning that all other factors were kept constant except for the study time. Therefore, by randomly assigning the students to the two groups and having them study the same list of words, any differences in recall can be attributed to the difference in study time. Additionally, the fact that the group studying for 10 minutes had significantly better recall than the 5-minute group suggests a causal relationship, indicating that more study time caused better recall.

In a Well-Controlled Experiment, an Educational Psychologist Randomly Assigned Two