Ganel et al. (2008) designed a modified Ponzo (visual) illusion in which line 1 appears to be longer than line 2, when, in reality, line 2 is longer. Participants are asked to judge the line lengths and to reach and grab the ends of the lines. The results of this investigation reveal _____.
A) the interaction of the ventral and dorsal stream
B) that the visual illusion affects both the ventral and dorsal streams
C) the effects of damage to the ventral pathway
D) that the illusion only affects ventral stream processing

Question

Quizplus · Accepted Answer

The study by Ganel et al. (2008) demonstrated that while visual illusions can affect our perception of object size (processed in the ventral stream), they do not influence our actions towards those objects in the same way, indicating that the dorsal stream (involved in guiding actions) is not deceived by the illusion.

Ganel Et Al