Visual long-term memory has a massive storage capacity for object details.
One of the major lessons of memory research has been that human memory is fallible, imprecise, and subject to interference. Thus, although observers can remember thousands of images, it is widely assumed that these memories lack detail. Contrary to this assumption, here we show that long-term memory is capable of storing a massive number of objects with details from the image. Participants viewed pictures of 2,500 objects over the course of 5.5 h. Afterward, they were shown pairs of images and indicated which of the two they had seen. The previously viewed item could be paired with either an object from a novel category, an object of the same basic-level category, or the same object in a different state or pose. Performance in each of these conditions was remarkably high (92%, 88%, and 87%, respectively), suggesting that participants successfully maintained detailed representations of thousands of images. These results have implications for cognitive models, in which capacity limitations impose a primary computational constraint (e.g., models of object recognition), and pose a challenge to neural models of memory storage and retrieval, which must be able to account for such a large and detailed storage capacity.
Brady
Timothy F
TF
Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139, USA. tfbrady@mit.edu
Konkle
Talia
T
Alvarez
George A
GA
Oliva
Aude
A
D000328:Adult; D006801:Humans; D010364:Pattern Recognition, Visual / Q000502:physiology*; D010775:Photic Stimulation / Q000379:methods; D021641:Recognition, Psychology / Q000502:physiology*; D013997:Time Factors
Q J Exp Psychol. 1973 May;25(2):207-22
4515818
Science. 1999 Apr 2;284(5411):167-70
10102821
Curr Biol. 1995 May 1;5(5):552-63
7583105
Exp Psychol. 2007;54(4):298-303
17953150
Proc Natl Acad Sci U S A. 2006 Nov 14;103(46):17564-7
17088563
IEEE Trans Pattern Anal Mach Intell. 2008 Nov;30(11):1958-70
18787244
Cognition. 1998 Jul;67(1-2):1-20
9735534
Nat Rev Neurosci. 2003 Mar;4(3):231-4
12612635
Am J Psychol. 1992 Spring;105(1):101-14
1605323
Trends Cogn Sci. 2004 Oct;8(10):457-64
15450510
Nat Neurosci. 1998 Aug;1(4):275-7
10195159
J Exp Psychol Gen. 1986 Mar;115(1):39-61
2937873
Nat Neurosci. 1999 Nov;2(11):1019-25
10526343
Behav Brain Sci. 2003 Dec;26(6):709-28; discussion 728-77
15377128
Behav Brain Sci. 2001 Oct;24(5):939-73; discussion 973-1031
12239892
Proc Natl Acad Sci U S A. 2000 Sep 26;97(20):11125-9
11005879
Proc Natl Acad Sci U S A. 1992 Jan 1;89(1):60-4
1729718
Perception. 2007;36(12):1715-29
18283923
Trends Cogn Sci. 1997 Oct;1(7):261-7
21223921
Curr Biol. 1998 Apr 23;8(9):R303-4
9560330
J Exp Psychol Hum Percept Perform. 2004 Jun;30(3):519-37
15161384
Science. 1983 Apr 1;220(4592):25-30
6828877
Neuropsychologia. 2005;43(6):847-59
15716157
Learn Mem. 1997 Jan-Feb;3(5):341-65
10456103
J Cogn Neurosci. 2002 Feb 15;14(2):187-98
11970785
Behav Brain Sci. 1999 Aug;22(4):577-609; discussion 610-60
11301525