Q: Does the process of recognizing a misorientedfamiliar pattern trigger a torsional eye movementtending to reduce the misorientation?

[This is best viewed in slideshow mode (click slideShow/ViewShow). Except for this slide and the next one, powerpoint will automatically advance to the next slide at the appropriate time.]

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A powerpoint demonstration constructed by H. Pashler & V. S. Ramachandran, UCSD, 2/00.

In the next slide, you will see a black field with a white line down the center. Fixate on the red dot in the middleand try to keep your eye there until the slide disappears (20 sec).

In the slide that follows that, look at the black dot in thesame position you were just fixating. Now without movingyour head try reading one or the other word (Californiaor Ontario). As you read the word, make a mental note of the relationship between the vertical reference line thatruns down the middle of the screen and the afterimagegenerated by the adapting display.

There will be two more adapting and test displays.

[click mouse left key when ready to continue but you won’tneed to click after this.]

ONTARIOCALIFORNIA

Eye Move?Torsional

Angular DeviationSmaller

Diamond or Square?

The End.