2 create a graph to calculate the size of your

2) Create a graph to calculate the size of your illusion (you can do this by hand or by
using the excel/google spreadsheets template). Please paste your graph below.
3) What was your Point of Subjective Equality (PSE)? Write the number below.
4) Compute the size of your illusion. In other words, how many pixels longer did the
line on the RIGHT have to be before you saw it as being longer? (Hint: remember the
reference line was always 160 pixels in length).
5) Let’s imagine we tested someone in this experiment who has never had exposure to
buildings/corners in real life. If we assume that the carpentered world hypothesis is
correct, what would their PSE would be? What would the size of their illusion be?

6) Given what we talked about in class, give one explanation for why we tend to see the
line with the arrow tails as being longer than the line with the arrowheads? Is this
due to top-down or bottom-up processing?