Words students saw most often seemed to mean nicer things
Students judged meaningless words as pleasant simply because they had seen them again and again, and the same effect shapes music, faces, and symbols.

The strangest ad in the student newspaper was just one word, and it meant nothing at all.
There were no pictures, no prices, and no explanations. For weeks, those lone nonsense words kept popping up in the school papers at two universities in Michigan. One word showed up only once. Some appeared just a few times and others appeared much more often, up to twenty-five times. At the second school, the researchers flipped the counts, so the word that was rare on one campus was common on the other.
The setup was testing a simple idea that runs much of daily life: the more times we see something, the more we like it and the better we think it is.
At the end of the run, questionnaires went out to students and faculty. People were asked to rate whether each nonsense word seemed to carry a pleasant meaning or an unpleasant one. None of the words meant anything, but the readers did not know that.
The result was clear. The more often a word had appeared in the paper, the more likely people were to say it meant something good. A word seen twenty-five times felt warm and familiar. A word seen once felt cold and strange.
Psychologists describe that warm feeling as cognitive ease, the sense that something is easy for the brain to process. Repetition creates it artificially. Once a string of letters feels familiar, the brain tags it as safe and pleasant, even when there is no reason to do so.
The same pattern held well beyond the campus papers. English speakers shown Chinese characters, or even random shapes, liked them more the more times they saw them. Songs were rated more favorably after several listenings than on first play. In another test, people looking at yearbook photos rated the faces as more likable after seeing the same photo repeatedly.
None of the words, characters, songs, or faces had changed. Only the count had changed. Familiarity alone had made meaningless things feel like good things.
Questions people ask
Why would simply seeing something more often make us like it more?
Because the brain treats familiar things as safe. Something new could be a threat, while something seen many times without harm signals that it can be trusted, so repetition creates a feeling of ease that we read as liking.
Does this work for things besides made-up words?
Yes. The source notes that songs are judged more favorably after repeated listening, and yearbook photos seem more likable the more times people see them. Marketers rely on the same effect by repeating names, jingles, and logos.
How can I avoid being swayed by repetition?
Pause and ask whether you like it, or believe it, for a reason beyond familiarity. Checking evidence, seeking other sources, and giving your brain time to do harder thinking can reduce the pull of mere repetition.