Exercise 1: Why the Study Design Isolates Repetition Specifically — Possible Solution ======================================================================================== Without a design comparing repeated and non-repeated statements directly, several alternative explanations could account for why some statements were rated truer over time - for example, participants might simply have become more confident in their own judgments overall as sessions progressed, or certain statements might have just been inherently more plausible-sounding regardless of repetition. By including both repeated and non-repeated statements within the SAME set of sessions, evaluated by the SAME participants, the researchers could directly compare how truth ratings changed for statements that were shown again against statements that were equally plausible but shown only once. If general growing confidence over time were the real explanation, both repeated and non-repeated statements should have seen similarly rising truth ratings. Instead, only the repeated statements' ratings rose - isolating repetition itself, rather than the mere passage of time or growing rater confidence, as the specific real cause. The two-week spacing between sessions also matters: it makes it unlikely participants were simply remembering their own exact previous rating and repeating it out of consistency, since two weeks is enough time that most participants wouldn't accurately recall their specific rating of one statement out of sixty from a prior session. ANSWER: Including both repeated and non-repeated statements within the same sessions and participants lets researchers directly compare their change in truth ratings over time. Since only the repeated statements' ratings rose - not the non-repeated ones - this rules out general explanations like growing rater confidence over time, isolating repetition itself as the real cause rather than some other factor tied to the passage of time. WHY THIS WORKS AS AN ANSWER ------------------------------ This explains the specific methodological logic (a repeated vs. non-repeated comparison within the same study) that lets the real study isolate repetition as the cause, rather than just restating that the study found an effect.