In the kind of procedure used by Peterson and Peterson to study short-term memory (the text calls this procedure the Brown-Peterson Distractor Task), suppose that words were used instead of nonsense syllables. On the first 3 trials, the words are names of fruits, and recall is found to decrease across trials. On the 4th trial, the researcher presents the names of professions. It is found that recall recall on Trial 3. This phenomenon is called :