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An investigation of the dual image model structure of dreaming using vivid and vague images from tonic and phasic REM dream reports

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Fernandez, Shirin (1990) An investigation of the dual image model structure of dreaming using vivid and vague images from tonic and phasic REM dream reports. Unspecified thesis, University of Tasmania.

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Abstract

Seligman and Yellen (1987) have formulated a dual imagery theory of dream
production. They hypothesise that in dreams vivid imagery is
independently physiologically generated and will be unconstrained by the
plot of the dream, while vague imagery will be constrained as it is produced
by a process of cognitive synthesis which integrates the visual bursts into a
more or less coherent story. A study using 15 subjects who slept in a sleep
laboratory for one night was used to test this model. Subjects were
awakened during tonic and phasic REM periods of the night and asked to
recall their dreams and to rate the clarity of "the last most vivid image" and
"the most vague image".
This study examined three main groups of hypotheses related to Seligman
and Yellen's (1987) theory of dream construction: (1) The differences in
vividness or clarity of imagery between tonic and phasic REM, (2) The
differences in surprisingness of vivid and vague images in relation to the
preceding plot, and (3) Incorporation of events from the precious day in
dreams and comparison of incorporation in vague and vivid imagery.
The results supported the first hypothesis on the differences in clarity of
imagery between tonic and phasic REM sleep. This finding is consistent
with previous studies of tonic/phasic differences (Molinari & Foulkes, 1969).
In testing the second hypothesis it was found that there was almost no
difference in ratings of the surprisingness of vivid and vague images in
relation to the preceding plot. Furthermore, vivid images were also judged
to be context related when interchanged between two phasic dreams
collected on the same night. The third hypothesis concerned incorporation
of events from the previous day in dreams. It was found that there was
more direct incorporation from the subject's own diary record than from a diary of a randomly matched subject. There was, however, no differential
process in incorporation between vivid and vague images.
Thus, contrary to the Seligman and Yellen (1987) theory there is evidence
that vivid images are at least partially constrained by a process of cognitive
construction in the formation of a dream, and there is no evidence of any
differences in the cognitive constraint on vague and vivid images.
The results of this study are not consistent with he Seligman and Yellen
(1987) theory and instead implicate a process of cognitive construction in the
formation of vivid as well as vague images.

Item Type: Thesis (Unspecified)
Keywords: Sleep, Dreams
Copyright Holders: The Author
Copyright Information:

Copyright 1990 the Author - The University is continuing to endeavour to trace the copyright
owner(s) and in the meantime this item has been reproduced here in good faith. We
would be pleased to hear from the copyright owner(s).

Additional Information:

Half-title: REM sleep and the efficacy of the dual image model. Thesis (M.Psych.)--University of Tasmania, 1991. Includes bibliographical references (leaves 69-81)

Date Deposited: 08 Dec 2014 23:56
Last Modified: 16 Aug 2016 01:23
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