Effects of Instructional Set and Physical Stimuli on the Mueller-Lyer Illusion Page: 51
This dissertation is part of the collection entitled: UNT Theses and Dissertations and was provided to UNT Digital Library by the UNT Libraries.
Extracted Text
The following text was automatically extracted from the image on this page using optical character recognition software:
51
figure without an apex line are immune to the illusion; they
are simply not as susceptible as subjects influenced by the
"confusing" extents between the obliques' tips.
Hypothesis One of this study was proposed as a result
of suggestions by Gardner and Long (2). They suggested that
an "analytic" attitude could be facilitated. in subjects if
they were given instructions to attend to the relevant ex-
tents of the Mueller-Lyer figure and ignore the irrelevant
extents. Results of the test of this hypothesis, as stated
in Table I, F(1,84)=l.0775, were not significant. The means
recorded in Table II reveal that subjects given "special"
instructions appear to perform better than subjects not
given "special" instructions when viewing two of the three
configurations of the Mueller-Lyer figure. It was again the
"apex line absent" figure which proved to be the contaminat-
ing factor in this comparison, A t test was applied to the
two "apex line absent" cells, the result of which is pre-
sented. in Table VII. That this result is significant,
t=2.586, p<.0l, in a direction opposite of that expected,
creates some further questions concerning the relevance of
the "apex line absent" figure. Instructions designed to
enhance an "analytic" attitude in subjects seem to increase
the magnitude of the Mueller-Lyer illusion for subjects view-
ing "apex line absent" figures.
Several explanations may be appropriate to explain this
result. First, it might be considered. that without the
Upcoming Pages
Here’s what’s next.
Search Inside
This dissertation can be searched. Note: Results may vary based on the legibility of text within the document.
Tools / Downloads
Get a copy of this page or view the extracted text.
Citing and Sharing
Basic information for referencing this web page. We also provide extended guidance on usage rights, references, copying or embedding.
Reference the current page of this Dissertation.
Hall, David Lawrence Boyer. Effects of Instructional Set and Physical Stimuli on the Mueller-Lyer Illusion, dissertation, December 1970; Denton, Texas. (https://digital.library.unt.edu/ark:/67531/metadc663521/m1/58/: accessed April 19, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; .