Procedural memory, like semantic memory, is not dependent on the hippocampus or related structures; indeed, amnesic
patients do not show impairments in the various types of procedural learning and memory tasks described earlier.
It is also important to note that to date there is no evidence to suggest how real amnesics would perform on a negative priming task.
One of the two groups that received the simulate amnesia instructions (see Appendix for instructions used) was further instructed about how amnesics perform on a variety of memory tasks.
Preserved learning in amnesic
patients: Perspectives from research on direct priming.
For instance, the amnesics had no idea they had read a list of five-letter words including "table," but when told to complete the word stem "tab-" with whatever came to mind, they responded with "table" as often as healthy study participants did.
Other researchers went on to probe the unconscious memories of amnesics with different implicit tasks.
Replaying the Game: Hypnagogic Images in Normals and Amnesics
," Science, 209 no.
lasting indirect memory performance for abstract shapes in amnesics and
completion priming in amnesics by cueing with previously novel
have a disproportionately severe memory deficit for interactive context.
1998, Expt 1); (6) encoding conditions that emphasize rehearsal rather than word order (Read, 1996, Expt 2); and (7) controls relative to amnesics
(Schachter, Verfaellie & Pradere, 1996).
Misattribution of fame has been taken as evidence of implicit memory for presented names in amnesics
(Squire & McKee, 1992), and in this study indicates that patients encoded the names in memory despite anaesthesia.
explicit memory dissociations in amnesics
and normals might be evidence for the separability of memory processing from conscious experience; but they might also indicate the existence of multiple memory systems with different levels of access to awareness.