Mental Rotation

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Screen shot of PEBL's Mental Rotation Test

WARNING. THE VERSION OF THIS TEST DISTRIBUTED IN PEBL TEST BATTERY 0.6 AND PEBL RELEASE 0.11 HAS A BUG SUCH THAT RESPONSES ARE NOT CORRECTLY RECORDED. CONTACT THE PEBL LIST FOR AN UPDATED VERSION.

Contents

[edit] About

A simple implementation of Shepard & Metzler's classic mental rotation task.

[edit] Notes

Test is rotation/Rotation.pbl This is a very barebones implementation, and researchers should consider modifying it with more polygons, rotations, etc. to suit their needs. Also look at the objectjudgment tasks for similar tests.

New polygons can be specified by changing the x,y points in the following

stim1 <- [[-20,  0,  0, 20,20, 0, 0,-20],
 [-80,-80,10,10,80,80,30, 30]]
stim2 <- [[-80, 80, 80,-50,-50,-80],
 [-40,-40,-20,-20,40,40]]

[edit] Options

Instructions have been translated into Turkish and English.

[edit] Data Output

Data are stored in rotate-<gsubnum>.txt.

Columns are as follows:

subcode trial cond polygon angle same/diff correct rt

Example columns:

0 1 0 1 -2 D 0 1563
0 2 0 2 2 S 1 358
0 3 1 2 4 D 1 309
0 4 1 2 -2 S 0 106
0 5 1 1 2 D 1 79
0 6 0 1 2 D 0 66
0 7 1 2 0 S 0 173
  • The column headers are not saved in the file, so you can more easily concatenate multiple subject data files.
  • the column 'polygon' determines which of the two polygons was presented.
  • the column 'cond' specifies whether the target is the original or its reverse image
  • the column 'angle' specifies the angle of rotation, in 45-degree increments

[edit] References

Berteau-Pavy, D., Raber, J., & Piper, B. (2011). Contributions of age, but not sex, to mental rotation performance in a community sample. PEBL Technical Report Series [On-line], #2011-02.

[edit] See Also

PEBL Test Battery

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