Editing Cognition (section)

====Memory span====
During the ''[[memory span]] experiment'', each subject is presented with a sequence of [[Stimulus (physiology)|stimuli]] of the same kind; words depicting objects, numbers, letters that sound similar, and letters that sound dissimilar. After being presented with the stimuli, the subject is asked to recall the sequence of stimuli that they were given in the exact order in which it was given. In one particular version of the experiment, if the subject recalled a list correctly, the list length was increased by one for that type of material, and vice versa if it was recalled incorrectly. The theory is that people have a memory span of about seven items for numbers, the same for letters that sound dissimilar and short words. The memory span is projected to be shorter with letters that sound similar and with longer words.<ref>{{cite journal | vauthors = May CP, Hasher L, Kane MJ | title = The role of interference in memory span | journal = Memory & Cognition | volume = 27 | issue = 5 | pages = 759–767 | date = September 1999 | pmid = 10540805 | doi = 10.3758/BF03198529 | doi-access = free }}</ref>