Locating short- and long-term memory in the brain. Studying people with brain damage that has affected one function while sparing the other. Patients with functioning stm who can t form new ltms, patients with poor stm but functioning ltm. Double dissociation, indicates that stm and ltm operate independently and are served by different mechanisms. H. m. demonstrated that it is possible to lose the ability to form new ltms while still retaining. K. f. had greatly reduced digit span (about 2) but had a functioning ltm. Deborah talmi and colleagues (2005) measured fmri responses to tasks involving stm/ltm. Participants presented with a list of words, then a single probe word. Probe was (1) a word near the beginning or (2) a word near the end or (3) new word. Task was to indicate whether the word has been presented before. Results indicated that probe words from the beginning (represent ltm) activated areas of the brain associated with ltm and stm.