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Haptic memory
Haptic memory is a form of sensory memory that refers to the recollection of data acquired by touch after a stimulus has been presented. Haptic memory is used regularly when assessing the necessary forces for gripping and interacting with familiar objects. It may also influence one’s interactions with novel objects of an apparently similar size and density. Similar to visual iconic memory, traces of haptically acquired information are short lived and prone to decay after approximately two seconds. Haptic memory is best for stimuli applied to areas of the skin that are more sensitive to touch. Haptics can be classified as a type of perceptual system which involves two subsystems; cutaneous and kinesthetic. The former refers to anything that is skin related, whereas the latter is muscle sense. Haptics involves active, manual examination and is quite capable of processing the material traits of surfaces or objects.〔Lederman, S J and Klatzky RL; Attention, Perception, & Psychophysics. Haptic Perception: A tutorial. Issn 1943-3921, 10/2009, Volume 71, Issue 7, pp. 1439 – 1459〕
==Overview==
Perhaps the first experiment conducted to study the phenomenon of haptic memory was that of Bliss, Crane, Mansfield, and Townsend who investigated the characteristics of immediate recall for brief tactile stimuli applied to the hand. The results obtained showed a haptic memory store remarkably similar to the visual memory store suggested by Sperling in 1960, with a capacity of approximately four to five items. Similar to tests of visual sensory memory, it was also found that haptic memory performance was significantly improved with the use of partial report procedures. This particular finding is consistent with more recent research by Gallace in 2008. Bliss et al. interpreted this difference in partial report versus whole report as a sensory form of memory for passively presented tactile stimuli with a high capacity and short duration. Additional support for the short duration of haptic memory comes from studies by Gilson and Baddeley in 1969. According to these studies, memory for stimuli applied to the skin is resilient for approximately ten seconds after removal of the stimulus, even when the individual is engaged in tasks that inhibit verbal rehearsal. After this delay, the memory trace becomes vulnerable to forgetting as it decays from the haptic memory store and begins to rely on a more central memory store. Similar findings were later reported by Miles and Borthwick in 1996, who emphasized the role of tactile interference on discriminability of the target location and the role of central processing resources in consolidation of haptic memory. More recent experimental procedures and technologies such as minielectrode recording devices and transcranial magnetic stimulation have allowed for mapping of brain areas involved in the storage of tactile memories. Implicated in most of these studies is the primary somatosensory cortex. More recent studies have also investigated a broader selection of participants, allowing for the discovery of an intact haptic memory in infants.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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