Two individuals witness a staged crime as part of an experiment. Witness 1 initially tells an experimenter they remember the perpetrator wearing a green jacket. Later, Witness 1 overhears Witness 2 confidently telling another experimenter that the perpetrator's jacket was brown. When officially questioned a day later, Witness 1 now reports with certainty that the jacket was brown, genuinely believing their new memory is accurate. Which phenomenon provides the most specific explanation for the ch