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Results
After you are finished, a results window will
appear:
The dependent measures are formatted in the
above window as follows (you may want to print this page in
order to refer to it after you are finished with the experiment):
<Lower threshold, Upper threshold>, Point of
Subjective Equality
The top portion of the window contains a list
of results from ascending trials on the left and descending
trials on the right. For each trial, a lower and upper threshold
is shown along with a calculated point of subjective equality
(e.g., Trial 1 <104%, 112%>, 108%). Below this are the average
trial type results for the ascending trials (on the left)
(i.e., <105%, 117%>, 111%) and the descending trials (on
the right) (i.e., <104%, 120%>, 112%). Below this are the
results averaged over all the trials in the experiment (i.e.,
<105%, 119%>, 112%).
As you can see, the illusion has an effect in
both types of trials, but there seems to be little difference
between type of trial (i.e., 111% vs. 112%). Overall the point
of subjective equality is 112%. In other words, for this particular
subject, when the comparison line length was 112% of the standard
line length, the two lines were maximally indistinguishable in
terms of their respective lengths.
So what is your point of subjective equality?
Try the experiment and see!
Start
Experiment
Back to
Dig Deeper Page
These pages and applets were created by Christopher
Currie.
Send questions concerning this unit or applets to
The Epsych Development Team or to
ccurrie@s.psych.uiuc.edu.
(Last update: June 14, 2000).
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