change detection - CogLab Report Change Detection...

CogLab Report: Change Detection
Introduction
The question under investigation is change blindness, that is, the difficulty in detecting
changes in scenes. Ronald Rensink and coworkers did a similar experiment where they
presented one picture to a subject, followed by a blank field, followed by the same
picture, but with an item missing, followed by the blank field, then by the original picture
and so on. These pictures were rotated and alternated in a way that was difficult for the
subject to determine what the change or difference was if any. He found that the pictures
had to be alternated and rotated back and forth a number of times before the difference
was detected. The importance of attention (or lack of it) in determining whether or not a
subject has change blindness was exhibited by adding a cue indicating which part of a
scene has been changed. Rensink tested this and participants detected the changed much
more quickly and correctly.