Part
1
From
a number of recent studies, it has become clear that blind people can
appreciate the use of outlines and perspectives to describe the arrangement
of objects and other surfaces in space. But pictures are more than literal
representations. This fact was drawn to my attention dramatically when a
blind woman in one of my investigations decided on her own initiative to
draw a wheel as it was spinning. To show this motion, she traced a curve
inside the circle (Fig. 1). I was taken aback. Lines of motion, such as the
one she used, are a very recent invention in the history of illustration.
Indeed, as art scholar David Kunzle notes, Wilhelm Busch, a trend-setting
nineteenth-century cartoonist, used virtually no motion lines in his
popular figures until about 1877.
When I asked several other blind
study subjects to draw a spinning wheel, one particularly clever rendition
appeared repeatedly: several subjects showed the wheel’s spokes as curved
lines. When asked about these curves, they all described them as
metaphorical ways of suggesting motion. Majority rule would argue that this
device somehow indicated motion very well. But was it a better indicator
than, say, broken or wavy lines – or any other kind of line, for that
matter? The answer was not clear. So I decided to test whether various lines
of motion were apt ways of showing movement or if they were merely
idiosyncratic marks. Moreover, I wanted to discover whether there were
differences in how the blind and the sighted interpreted lines of motion.
To search out these answers, I
created raised-line drawings of five different wheels, depicting spokes
with lines that curved, bent, waved, dashed and extended beyond the
perimeter of the wheel. I then asked eighteen blind volunteers to feel the
wheels and assign one of the following motions to each wheel: wobbling,
spinning fast, spinning steadily, jerking or braking. My control group
consisted of eighteen sighted undergraduates from the University of
Toronto.
All but one of the blind
subjects assigned distinctive motions to each wheel. Most guessed that the
curved spokes indicated that the wheel was spinning steadily; the wavy
spokes, they thought, suggested that the wheel was wobbling; and the bent
spokes were taken as a sign that the wheel was jerking. Subjects assumed
that spokes extending beyond the wheel’s perimeter signified that the wheel
had its brakes on and that dashed spokes indicated the wheel was spinning
quickly.
In addition, the favoured
description for the sighted was the favoured description for the blind in
every instance. What is more, the consensus among the sighted was barely
higher than that among the blind. Because motion devices are unfamiliar to
the blind, the task I gave them involved some problem solving. Evidently,
however, the blind not only figured out meanings for each line of motion,
but as a group they generally came up with the same meaning at least as
frequently as did sighted subjects.
Part
2
We have found that the blind
understand other kinds of visual metaphors as well. One blind woman drew a
picture of a child inside a heart – choosing that symbol, she said, to show
that love surrounded the child. With Chang Hong Liu, a doctoral student
from China, I have begun exploring how well blind people understand the
symbolism behind shapes such as hearts that do not directly represent their
meaning.
We gave a list of twenty pairs
of words to sighted subjects and asked them to pick from each pair the term
that best related to a circle and the term that best related to a square.
For example, we asked: What goes with soft? A circle or a square? Which
shape goes with hard?
All our subjects deemed the
circle soft and the square hard. A full 94% ascribed happy to the circle,
instead of sad. But other pairs revealed less agreement: 79% matched fast
to slow and weak to strong, respectively. And only 51% linked deep to
circle and shallow to square. (See Fig. 2.) When we tested four totally
blind volunteers using the same list, we found that their choices closely
resembled those made by the sighted subjects. One man, who had been blind
since birth, scored extremely well. He made only one match differing from
the consensus, assigning ‘far’ to square and ‘near’ to circle. In fact,
only a small majority of sighted subjects – 53% – had paired far and near
to the opposite partners. Thus, we concluded that the blind interpret
abstract shapes as sighted people do.
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