title: How does aging affect the types of error made in a visual short-term memory 'object-recall' task?
abstract: This study examines how normal aging affects the occurrence of different types of incorrect responses in a visual short-term memory (VSTM) object-recall task. Seventeen young (Mean = 23.3 years, SD = 3.76), and 17 normally aging older (Mean = 66.5 years, SD = 6.30) adults participated. Memory stimuli comprised two or four real world objects (the memory load) presented sequentially, each for 650 ms, at random locations on a computer screen. After a 1000 ms retention interval, a test display was presented, comprising an empty box at one of the previously presented two or four memory stimulus locations. Participants were asked to report the name of the object presented at the cued location. Errors rates wherein participants reported the names of objects that had been presented in the memory display but not at the cued location (non-target errors) vs. objects that had not been presented at all in the memory display (non-memory errors) were compared. Significant effects of aging, memory load and target recency on error type and absolute error rates were found. Non-target error rate was higher than non-memory error rate in both age groups, indicating that VSTM may have been more often than not populated with partial traces of previously presented items. At high memory load, non-memory error rate was higher in young participants (compared to older participants) when the memory target had been presented at the earliest temporal position. However, non-target error rates exhibited a reversed trend, i.e., greater error rates were found in older participants when the memory target had been presented at the two most recent temporal positions. Data are interpreted in terms of proactive interference (earlier examined non-target items interfering with more recent items), false memories (non-memory items which have a categorical relationship to presented items, interfering with memory targets), slot and flexible resource models, and spatial coding deficits.
authors: Vision and Eye Research Unit, Postgraduate Medical Institute, Anglia Ruskin University Cambridge, UK.
authors: Raju P
authors: RP
authors: Sapkota
authors: Vision and Eye Research Unit, Postgraduate Medical Institute, Anglia Ruskin University Cambridge, UK ; Department of Computing and Technology, Anglia Ruskin University Cambridge, UK.
authors: Ian
authors: I
authors: van der Linde
authors: Vision and Eye Research Unit, Postgraduate Medical Institute, Anglia Ruskin University Cambridge, UK.
authors: Shahina
authors: S
authors: Pardhan
keywords: age differences; memory load; memory objects; object-recall; recency
references: Psychol Aging. 1997 Mar;12(1):12-21
references: 9100264
references: Dev Psychol. 2006 Nov;42(6):1089-102
references: 17087544
references: Nature. 2008 May 8;453(7192):233-5
references: 18385672
references: Science. 2008 Aug 8;321(5890):851-4
references: 18687968
references: J Exp Psychol Hum Percept Perform. 2006 Dec;32(6):1436-51
references: 17154783
references: Psychon Bull Rev. 2008 Jun;15(3):543-7
references: 18567252
references: Spat Vis. 1997;10(4):433-6
references: 9176952
references: J Exp Psychol Hum Learn. 1980 Mar;6(2):174-215
references: 7373248
references: Nature. 2004 Apr 15;428(6984):751-4
references: 15085133
references: Q J Exp Psychol (Hove). 2010 May;63(5):856-62
references: 20306370
references: Q J Exp Psychol B. 2005 Jul-Oct;58(3-4):361-77
references: 16194974
references: Psychol Aging. 2000 Sep;15(3):527-41
references: 11014715
references: J Exp Psychol Learn Mem Cogn. 2000 May;26(3):683-702
references: 10855426
references: J Vis. 2004 Dec 29;4(12):1120-35
references: 15669916
references: Perception. 2011;40(5):538-48
references: 21882718
references: J Exp Psychol Hum Percept Perform. 2007 Feb;33(1):31-47
references: 17311477
references: Memory. 2012;20(1):14-27
references: 22133192
references: Psychol Sci. 2004 Feb;15(2):106-11
references: 14738517
references: Memory. 2004 Jan;12(1):75-89
references: 15098622
references: Nature. 1997 Nov 20;390(6657):279-81
references: 9384378
references: Spat Vis. 1997;10(4):437-42
references: 9176953
references: Nat Rev Neurosci. 2003 Oct;4(10):829-39
references: 14523382
references: Psychol Aging. 2003 Sep;18(3):608-15
references: 14518820
references: Mem Cognit. 1996 Jul;24(4):403-16
references: 8757490
references: Percept Psychophys. 1988 Apr;43(4):346-54
references: 3362663
references: Psychol Aging. 1994 Sep;9(3):339-55
references: 7999320
references: Percept Psychophys. 2002 Aug;64(6):882-95
references: 12269296
references: J Exp Psychol Gen. 2008 Feb;137(1):163-81
references: 18248135
references: Psychol Aging. 2000 Jun;15(2):323-34
references: 10879586
references: J Exp Psychol Learn Mem Cogn. 2000 Sep;26(5):1170-87
references: 11009251
references: Percept Psychophys. 2005 May;67(4):676-90
references: 16134461
references: Percept Psychophys. 1988 Oct;44(4):369-78
references: 3226885
references: Acta Psychol (Amst). 2008 May;128(1):33-44
references: 17983608
references: Mem Cognit. 2008 Jan;36(1):43-52
references: 18323061
references: Acta Otolaryngol Suppl. 1990;476:167-75; discussion 176
references: 2087959
references: Cogn Psychol. 1991 Jul;23(3):420-56
references: 1884598