PMID- 22286297
OWN - NLM
STAT- MEDLINE
DCOM- 20120605
LR  - 20191210
IS  - 1534-7362 (Electronic)
IS  - 1534-7362 (Linking)
VI  - 12
IP  - 1
DP  - 2012 Jan 27
TI  - The retention and disruption of color information in human short-term visual 
      memory.
PG  - 26
LID - 10.1167/12.1.26 [doi]
AB  - Previous studies have demonstrated that the retention of information in 
      short-term visual perceptual memory can be disrupted by the presentation of 
      masking stimuli during interstimulus intervals (ISIs) in delayed discrimination 
      tasks (S. Magnussen & W. W. Greenlee, 1999). We have exploited this effect in 
      order to determine to what extent short-term perceptual memory is selective for 
      stimulus color. We employed a delayed hue discrimination paradigm to measure the 
      fidelity with which color information was retained in short-term memory. The task 
      required 5 color normal observers to discriminate between spatially 
      non-overlapping colored reference and test stimuli that were temporally separated 
      by an ISI of 5 s. The points of subjective equality (PSEs) on the resultant 
      psychometric matching functions provided an index of performance. Measurements 
      were made in the presence and absence of mask stimuli presented during the ISI, 
      which varied in hue around the equiluminant plane in DKL color space. For all 
      reference stimuli, we found a consistent mask-induced, hue-dependent shift in PSE 
      compared to the "no mask" conditions. These shifts were found to be tuned in 
      color space, only occurring for a range of mask hues that fell within bandwidths 
      of 29-37 deg. Outside this range, masking stimuli had little or no effect on 
      measured PSEs. The results demonstrate that memory masking for color exhibits 
      selectivity similar to that which has already been demonstrated for other visual 
      attributes. The relatively narrow tuning of these interference effects suggests 
      that short-term perceptual memory for color is based on higher order, non-linear 
      color coding.
CI  - (c) ARVO
FAU - Nemes, Vanda A
AU  - Nemes VA
AD  - Bradford School of Optometry and Vision Science, University of Bradford, 
      Bradford, UK. V.A.Nemes@Bradford.ac.uk
FAU - Parry, Neil R A
AU  - Parry NR
FAU - Whitaker, David
AU  - Whitaker D
FAU - McKeefry, Declan J
AU  - McKeefry DJ
LA  - eng
PT  - Comparative Study
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20120127
PL  - United States
TA  - J Vis
JT  - Journal of vision
JID - 101147197
SB  - IM
MH  - Adult
MH  - Attention/*physiology
MH  - Color Perception/physiology
MH  - Female
MH  - Humans
MH  - Male
MH  - Memory, Short-Term/*physiology
MH  - Perceptual Masking/*physiology
MH  - Photic Stimulation
MH  - Retention, Psychology/*physiology
MH  - Sensory Thresholds
MH  - Space Perception/*physiology
EDAT- 2012/01/31 06:00
MHDA- 2012/06/06 06:00
CRDT- 2012/01/31 06:00
PHST- 2012/01/31 06:00 [entrez]
PHST- 2012/01/31 06:00 [pubmed]
PHST- 2012/06/06 06:00 [medline]
AID - 12.1.26 [pii]
AID - 10.1167/12.1.26 [doi]
PST - epublish
SO  - J Vis. 2012 Jan 27;12(1):26. doi: 10.1167/12.1.26.