VisualArray {WMCapacity}R Documentation

Working memory visual array change detection responses

Description

This dataset contains the (cleaned) data which was analyzed in Rouder, Morey, Cowan, Zwilling, Morey, and Pratte (2008).

Usage

data(VisualArray)

Format

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

Details

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.

Source

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.

Examples

data(VisualArray)
## Aggregated hit and false alarm rates
tapply(VisualArray$resp,list(VisualArray$ischange,
       VisualArray$N,VisualArray$prch),mean)


[Package WMCapacity version 0.9.1 Index]