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In 2013, a study showed that primacy effect is also prominent in decision making based on experience in a repeated choice paradigm, a learning process also known as operant conditioning. The authors showed that there is a large importance to the value of the first reward on subsequent behaviour, a phenomenon they denoted as outcome primacy.

In another study, the subjects received one of two sentences. For example, one may be given "Steve is smart, diligent, critical, impulsive, and jealous." and the other "Steve is jealous, impulsive, critical, diligent, and smart." These two sentences contain the same information. The first one suggests positive trait at the beginning while the second one has negative traits. Researchers found that the subjects evaluated Steve more positive when given the first sentence, compared to the second one.