Notably, the abstract of the 2015 study specifically points out that the 1986 study has frequently failed to replicate, and although it finds an effect, the 2015 study has n = 28. As always with psychology studies, we would do well not to assert their purported findings as facts, as with the statement "The brand effect is so strong that displaying a Visa logo near checkout literally increases consumer spend". Psychology as a field is far too unreliable to make such assertions with confidence.
