[tabi] Fwd: App turns tablet into math aid for visually impaired students (w/ video)

  • From: Lighthouse of the Big Bend <lighthousebigbend@xxxxxxxxx>
  • To: tabi <tabi@xxxxxxxxxxxxx>, fcb-l <fcb-l@xxxxxxx>
  • Date: Tue, 6 Mar 2012 15:11:29 -0500

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App turns tablet into math aid for visually impaired students (w/ video)

March 5, 2012 <http://www.physorg.com/archive/05-03-2012/>  by David

Without looking down, Kira runs her index finger across the screen of an
Android tablet that she is holding in her lap. For the occasion, she has
painted her fingernails bright pink. When her finger touches a line drawn on
the screen, the tablet vibrates quietly. Scanning her finger back and forth
and feeling the vibration come and go allows her to trace the line's path.
When her finger reaches a pink dot, the tablet gives off an electronic tone
and she grins delightedly.

Kira is one of two visually impaired high school students
<http://www.physorg.com/tags/high+school+students/>  who are testing a new
Android app, one designed to assist students like her in mastering algebra,
geometry <http://www.physorg.com/tags/geometry/> , graphing and other
subjects that are particularly hard to comprehend without the aid of normal

The app <http://www.physorg.com/tags/app/>  is the brainstorm of Jenna
Gorlewicz, a graduate student in the Medical and Electromechanical Design
Laboratory (MED Lab) at Vanderbilt University, and her advisor Robert
Webster, an assistant professor of mechanical
<http://www.physorg.com/tags/mechanical+engineering/>  engineering, who
directs the lab. Given the enthusiastic reaction of Kira, her classmate
<http://www.physorg.com/tags/classmate/>  Quinn and their teacher, her
innovation could have a major impact on how science, technology, engineering
and math - the critical STEM subjects - are taught to the visually impaired.

A major change in direction

The project is a considerable change from the research projects that
Gorlewicz pursued during her first two years in the MED Lab. Supported by a
fellowship from the National Science Foundation, she worked on improving
cochlear implant surgery and miniaturizing endoscopic robotic capsules. But
she wasn't completely satisfied: "I'm a real people person," she explained.
"So I wanted a project that would let me interact directly with the people
it was helping."

"Jenna kept saying that she wanted to work more with people, so we began
exploring other possible projects," said Webster. "Fortunately, her
fellowship and my NSF CAREER Award gave us enough flexibility to think
outside the box and explore a wide variety of thesis topics for her."

One of the ideas they came up with was a study of the effectiveness of
haptic technology: technology that takes advantage of a user's sense of
touch by applying forces, vibrations or motions to enhance remote control of
machines, devices or virtual objects. The lab was experimenting with haptic
interfaces to control some of their biomedical robots.

Matching haptics with visually impaired

"When I began reading articles about haptic technology being incorporated
into these new touch screen devices, I realized that the people who really
need haptics are people with impaired vision because they heavily rely on
their sense of touch to 'see' the world around them." Gorlewicz said. "I
love math and I love teaching, so I immediately thought of using them for
math education, because it has such a strong visual component." After she
did some research into the methods that are currently used to teach
mathematics to the visually impaired, she became even more enthusiastic
about her idea.

When she started the new project 18 months ago, the only off-the-shelf
tablet that Gorlewicz could find that included tactile feedback was a $2,500
model produced for industrial and commercial applications. Since then haptic
feedback has been added in a number of consumer tablets that sell for as
little as $300.

The grad student has programmed these tablets so they vibrate or generate a
specific tone when the student's fingertip touches a line, curve or shape
displayed on the screen. The devices can generate vibrations with a number
of different frequencies and hundreds of different sounds. This allows
Gorlewicz to assign different tactile or audio signals to different
features. For example, in an exercise that includes an X-Y grid, she can set
the horizontal and vertical lines to vibrate at different frequencies and
set points to make a certain tone. In this way, it's easier for the students
to distinguish between the gridlines and the points on the grid.

"If one of these tablets were networked wirelessly to the teacher's
computer, then, when he or she projects a graph or equation on the screen at
the front of the class, the same graph would appear on the student's tablet.
They could then use their senses of touch and hearing to follow the content
the teacher is discussing," Gorlewicz said.

"When Jenna first approached me with the idea, I thought it would be
interesting and might be some small help," said Ann Smith, the teacher of
the visually impaired who works with Kira and Quinn at Hillsboro High School
in Nashville. "The more experience I have with it, the more valuable I think
it could be. It makes the work more accessible. The students are really
interested and they talk about it even when Jenna isn't here."

Hillsboro High follows the approach of including students with special needs
in classes with their sighted peers as much as possible. That means Kira and
Quinn attend general education classes. Smith sits with them during their
math classes and uses various methods to ensure that they can follow the
teacher's presentation. With Quinn, who can read Braille and see large
print, this involves duplicating the shapes and figures the teacher is using
on a small white board that he can hold close enough to see. In Kira's case
Smith must use tactile aids like pins and pipe-cleaners on a bulletin board
with raised graphing lines to reproduce complex mathematical shapes that
Kira can feel with her fingers.

"Because this takes a certain amount of time, we are always one or two steps
behind the teacher," Smith said. "One of these haptic tablets would allow
them to keep up much better. If I didn't have to attend class with them, it
would also make them feel more independent."

Smith also pointed out that such a tablet can be used by students with
widely differing degrees of impairment because it combines visual, tactile
and audio capabilities.

Some learning required

According to Kira and Quinn, there is a little bit of a learning curve with
the new device. "At first, I didn't think this would help me," Quinn said.
"But after I started using it I found that it can be very helpful."
According to Kira, "The biggest obstacle was getting the correct mental
images. However, once you get the knack, it gets fairly easy."

"It was amazing how quickly they caught on and how good they have become,"
Gorlewicz said.

According to the graduate student, every time she meets with the students,
they come up with new features that they would like her to add. The
configuration that they think would be the most useful is a touch-sensitive
version of the graphing calculators that are widely used by their sighted

"It would really help to have something like this because it makes us equal
to everyone else," Kira said.

Provided by Vanderbilt University

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