Description Usage Format Details Source Examples
This dataset contains the (cleaned) data which was analyzed in Rouder, Morey, Cowan, Zwilling, Morey, and Pratte (2008).
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A data frame with 12345 observations on the following 36 variables.
sub
the subject number
blk
the block number
trl
the trial number within a block
prch
the log-odds of a change trial within that block
N
the visual array set size
ischange
whether the array changed or not (1=changed)
resp
whether the participant responded “change” (1=changed)
RT
the response time
probesq
which square number was probed
newcol
the color of the probed square
c1
the color of square 1
x1
the x location of square 1
y1
the y location of square 1
c2
the color of square 2
x2
the x location of square 2
y2
the y location of square 2
c3
the color of square 3
x3
the x location of square 3
y3
the y location of square 3
c4
the color of square 4
x4
the x location of square 4
y4
the y location of square 4
c5
the color of square 5
x5
the x location of square 5
y5
the y location of square 5
c6
the color of square 6
x6
the x location of square 6
y6
the y location of square 6
c7
the color of square 7
x7
the x location of square 7
y7
the y location of square 7
c8
the color of square 8
x8
the x location of square 8
y8
the y location of square 8
cor
whether the participant was correct or not
oldcol
the color of the probed square in the study array
Each trial consisted of a presentation of N colored squares in an array, followed by a mask, and then a single square. The square was either the same color or a different color than the one in the same location in the first array. The participant responded “change” if they believed the square was different.
Rouder, J. N., Morey, R. D., Cowan, N., Zwilling, C. E., Morey, C. C. & Pratte, M. S. (2008). An Assessment of Fixed-Capacity Models of Visual Working Memory. Proceedings of the National Academy of Sciences, 105, 5976-5979.
1 2 3 4 | data(VisualArray)
## Aggregated hit and false alarm rates
tapply(VisualArray$resp,list(VisualArray$ischange,
VisualArray$N,VisualArray$prch),mean)
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