VisualArray: 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)

Arguments

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

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.

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.

Examples

Run this code

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

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