Changing change detection: Improving the reliability of measures of visual short-term memory capacity
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Changing change detection : Improving the reliability of measures of visual short-term memory capacity. / Kyllingsbæk, Søren; Bundesen, Claus.
I: Psychonomic Bulletin & Review, Bind 16, Nr. 6, 2009, s. 1000-1010.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Changing change detection
T2 - Improving the reliability of measures of visual short-term memory capacity
AU - Kyllingsbæk, Søren
AU - Bundesen, Claus
PY - 2009
Y1 - 2009
N2 - The change detection paradigm is a popular way of measuring visual short-term memory capacity. Using theparadigm, researchers have found evidence for a capacity of about four independent visual objects, confirmingclassic estimates that were based on the number of items that could be reported. Here, we determine thereliability of capacity measures found by change detection. We derive theoretical predictions of the variance ofthe capacity estimates and show how they depend on the number of items to be remembered and the guessingstrategy of the observer. We compare the theoretically derived variance to the variance estimated over repeatedblocks of trials with the same observer and find close correspondence between predicted and observed variances.Also, we propose a new version of the two-alternative choice change detection paradigm, in which thechoice is unforced. This new paradigm reduces the variance of the capacity estimate substantially.
AB - The change detection paradigm is a popular way of measuring visual short-term memory capacity. Using theparadigm, researchers have found evidence for a capacity of about four independent visual objects, confirmingclassic estimates that were based on the number of items that could be reported. Here, we determine thereliability of capacity measures found by change detection. We derive theoretical predictions of the variance ofthe capacity estimates and show how they depend on the number of items to be remembered and the guessingstrategy of the observer. We compare the theoretically derived variance to the variance estimated over repeatedblocks of trials with the same observer and find close correspondence between predicted and observed variances.Also, we propose a new version of the two-alternative choice change detection paradigm, in which thechoice is unforced. This new paradigm reduces the variance of the capacity estimate substantially.
KW - Faculty of Social Sciences
KW - Visuel korttidshukommelse
KW - Visual Short-Term Memory
U2 - doi:10.3758/PBR.16.6.1000
DO - doi:10.3758/PBR.16.6.1000
M3 - Journal article
VL - 16
SP - 1000
EP - 1010
JO - Psychonomic Bulletin and Review
JF - Psychonomic Bulletin and Review
SN - 1069-9384
IS - 6
ER -
ID: 16131899