Psychologist: Advocates of "aroma-priming" claim that certain scents—such as peppermint—sharpen mental focus and improve reasoning. In a recent study, volunteers solved a series of logic puzzles while a subtle peppermint scent was diffused in the room. Under a second, identical session one week later, the same volunteers were told that citrus scent would be present to "boost concentration," but in fact no scent at all was released. Comparing the two sessions, researchers found that puzzle accuracy and completion speed were just as high in the unscented "citrus" session as in the earlier peppermint-scented one.
Which one of the following statements is most strongly supported by the information above?
