By rehearsing only details that could be readily put into words, the participants had de-emphasised the nuances of their original visual memory, making it harder to access. This effect is incredibly robust, as indicated by quite possibly the biggest replication effort of all time in psychology.19 This was a massive collaborative effort by almost 100 scholars and 33 labs, including Jonathan Schooler and Daniel Simons, and published in 2014. All researchers followed the same protocol, and they found that even when the experiment was conducted by different researchers, in different countries, and
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