I Research Notes
Interactive Auditory and Visual
Images in Persons Who Are
Totally Blind
Carla Tinti, Dario Galati, Maria Gratia
Vecchio, Rossana De Beni, and Cesare
Cornoldi
Mental imagery can be a powerful aid for
human memory. In particular, memory is
enhanced by the creation of an interactive
image: a single complex image that
includes two or more items linked together.
For example, to remember the words whale
and cigar, a person can produce an image of
a whale with a cigar in its mouth (Paivio,
Clark, & Khan, 1988; Paivio, Walsh, &
Bons, 1994). Some studies (see, for
example, Jonides, Kahan, & Rozin, 1975)
have found that a similar strategy improves
the memory of people who are blind. That
is, people who are blind can use images that
have the essential characteristics of visual
objects, such as properties of shape and
location in space. The images do not con-
tain typical attributes unique to visual
objects, such as color or brightness
(Carpenter & Eisenberg, 1978; De Beni &
Cornoldi, 1988), but they seem to contain
characteristics of objects that could be
processed to enhance memory.
Auditory imagery plays an important
role in memory processes, and Tinti,
Cornoldi, and Marschark (1997) demon-
strated that interactive auditory imagery,
like interactive visual imagery, enhances
learning. In their experiments, sighted sub-
jects were asked to learn a list of paired-
associate words using an interactive
auditory image formed by the sounds repre-
sented by the words given. However, no
research has ever studied the possibility
offered by this auditory strategy to people
who are blind, who can sometimes have
difficulty with the corresponding visual
strategy.
In the experiment presented here, the
subjects were asked to create interactive
images, and the strategies they used in the
visual and auditory tasks were compared
using different groups of items: single,
pairs, and triplets. This procedure allowed
the authors to test the hypothesis that the
two modalities (visual and auditory) can be
partially independent at both the sensory
and representational levels and that persons
who are blind perform well when the audi-
tory modality is involved but not when the
visual modality is required.
The results could help researchers under-
stand the origin of the difficulty that people
who are blind have in creating interactive
visual images (De Beni & Cornoldi, 1985,
1988). If the problem is related to the com-
plexity of the stimuli, the results for an
auditory or visual task should be similar,
but if the problem is related to the type of
modality, the auditory task should lead to a
different level of performance than the
visual one.
METHOD
Subjects
Of the 30 subjects in the study, 15 were
congenitally totally blind from birth or age
2 and 15 were sighted. The blind subjects (5
women and 10 men), with a mean age of
37.6 years, who were contacted through the
Italian Association for the Blind, volun-
teered to participate. Their blindness was
due to retinitis pigmentosa (4 cases), con-
genital glaucoma (9 cases), or blennor-
rhagical conjunctivitis (2 cases).
©1999 AFB, All Rights Reserved Journal of Visual Impairment & Blindness, September 1999 579