Simultaneous Offset of Target and Mask Does Not Produce Object Substitution

Demonstrations: 16 Items - 0 ms Mask

After selecting a demonstration, fixate on the cross. Sixteen shapes will appear briefly (squares, circles, triangles, and diamonds). One of them is surrounded by four dots. Your task is to identify the shape within the four dots.

animated GIF (file size approx. 19 K)
Animated GIF files have a compact file size. You must have javascript-enabled browser to view them.
open demo window

AVI movie (file size approx. 427 K)
AVI files (Windows) are of a higher quality with greater temporal precision; however, AVI files take longer to download because of their size. Selecting a demo should automatically launch your browser's media player. Ensure that the media player is not set to loop the movie.

QuickTime movie (file size approx. 14 K)
QuickTime movies are viewable on either Mac or Windows platforms. You must have the QuickTime player to view them. Download Quicktime.

Most people can easily identify the shape inside the four dots. This is because the four dots vanish along with the target so there is no mismatch between the initial target representation and a subsequent representation of the mask alone.

Demonstrations: 16 Items - 0 ms Mask After selecting a demonstration, fixate on the cross. Sixteen shapes will appear briefly (squares, circles, triangles, and diamonds). One of them is surrounded by four dots. Your task is to identify the shape within the four dots.
animated GIF (file size approx. 19 K) Animated GIF files have a compact file size. You must have javascript-enabled browser to view them.	open demo window
AVI movie (file size approx. 427 K) AVI files (Windows) are of a higher quality with greater temporal precision; however, AVI files take longer to download because of their size. Selecting a demo should automatically launch your browser's media player. Ensure that the media player is not set to loop the movie.
QuickTime movie (file size approx. 14 K) QuickTime movies are viewable on either Mac or Windows platforms. You must have the QuickTime player to view them. Download Quicktime.