I've already given a general critique of why tablets should not be used in schools in Too cool for secondary school: why tablets should NOT be used in education, but there is one issue that gets to the heart of the matter. Typing, text and data manipulation is important in learning. Many
learners will be expected to write, edit and input data, not only while they
learn but also when using computers at work or at home for leisure. If tablets make you write sloer, edit slower, even alter the way you write down to shorter sentences, they may actually inhibit this important dimension in learning. As you progress through the education system you are expected to write more, in more styles and to a higher standard. Given the
increased use of tablets in secondary schools and universities, we must also ask whether
typing is better on touchscreens or keyboards. Are we missing the fact that
touchscreens may inhibit or even damage this dimension in learning?
Research
Research comparing touchscreen with
physical keyboards goes back over 20 years has consistently shown that touch
screens produce slower and less accurate performance when compared with physical
keyboards; Barrett & Krueger, 1994; Wilson, Inderrieden, & Liu, 1995;
Schneiderman (1998); Ryall (2006); Hinrichs (2007). Benco (2009) at the
University of Washington’s Information School, with Microsoft Research, showed
accidental touches and a 31% lower typing speed (or 20 words per minute faster).
But there’s even more bad news.
1. No feel for keys and boundaries
As there is no feel for key and keyboard boundaries, it is difficult to
gauge when you have found the right key, especially at speed, so you can’t make
small adjustments. This has been found to lead to slower typing speeds and
higher error rates. With no haptic or tactile
feedback through a physical keyboard, you fail to feel key and keyboard boundaries.
2. Slow visual checks
You also require visual checking while you type, which slows down typing
speed and increases error rates. Barrett (1994) claimed that touchscreens “pale in effectiveness” when
compared to physical keyboards, largely because of the lack of feedback and
need to visually check the touch keyboard. In
learning, you want students to focus on the text and tasks not typing.
3. No home row anchor
‘Home row’ resting means that typists can rest their hands on a physical
anchor, the lowest row of keys, to help them calibrate their finger movements
when typing. They can then look at the screen without interruption to increase speed,
reduce error rate and more importantly, focus on the writing task – meaning ,
expression and so on.
3. Text editing slow and difficult
A cursor, operated by a mouse or fingerpad is pixel accurate compared to
a finger, which makes highlighting, cutting, copying and pasting more difficult
and more prone to error. This causes real problems when doing pieces of even
basic writing, where learners have to learn through failure and do lots of error
correction, rewriting and reordering of words of prose. In more complex pieces
of writing it becomes critical. The danger is that touchscreen keyboards, being
more difficult to use, hamper progress and limit skills progression in writing.
4. Inappropriate for high-level tasks
Some learning tasks, such as coding, require large amounts of character editing,
and would be severely restricted on touchscreen. Mathematics quickly requires
high-level symbol manipulation. Additionally, when it comes to creative tools
such as graphic, audio and video media creation and manipulation, progress is
quite literally impossible with touchscreen. Fingers may also obstruct text
that is being manipulated.
5. Tilt matters
Typing on a surface that is flat also brings problems. A notebook or
laptop screen sits up at an angle from the keyboard. This angle is typically between
100 and 120 degrees. You may not have noticed but when you go into an Apple
store every Macbook is at exactly the same angle. Employees use Simplify Angle,
an iPhone app, to measure this angle of elevation when they open the store!
A device that has the keyboard at a 180 degree angle to the produced
text is a problem as it leads to awkward lean forward positions or requires the
addition of a special add-on, at extra cost, to tilt the tablet. Even then you
have to hold your hands in the air and this leads to fatigue, which may result in
less produced work and limit the amount of effort the learner will put into a piece
of written or other work.
6. Detracts from sustained use
Morris (2010) claims that touchscreens, compared to physical keyboards, puts
a brake on sustained use. For learning professionals this is a real worry as
students may stop prematurely or reduce performance in a writing task, simply
because of the limitations of the input device.
7. Alters linguistic style
Touchscreen may even alter style of expression, Wigdor (2007). It may
limit experimentation, more complex sentences and playing around with
vocabulary and style, all tasks which are important for skills development. This
is even more worrying. Of course,
physical keyboards can be added to tablets but at extra cost and one could
argue that this just reinforces the argument for buying a notebook or laptop in
the first place.
Conclusion
We can use
this evidence to identify the point in education where learning may become
inhibited, if not damaged, by tablet use. Note that this is not a fatal objection
to the use of tablets in education. It is, however, a severe warning about
their appropriateness for deeper and mature learning that involves even modest
amounts of writing, note taking, data input, use of mathematical notation, image,
audio and video manipulation, coding and so on. The danger is that we are being
lulled into believing that tablets are appropriate by qualitative reports from
students (who let’s be honest don’t mind doing less!). What’s needed is more
hard-headed research, not on attractiveness but on attainment.
Bibliography
Morris, M.R.,
Lombardo, J., Wigdor, D. 2010. Search: Supporting
Collaborative Search and Sensemaking on a Tabletop Display. Proc. CSCW 2010, 401-410.
Benko, H.,
Morris, M. R., Brush, A.J.B., Wilson, A.D. 2009. Insights on Interactive Tabletops: A
Survey of Researchers and Developers.
Microsoft Research Technical Report
MSR-TR-2009-22.
Wigdor, D.,
Penn, G., Ryall, K., Esenther, A., Shen, C. 2007. Living with a Tabletop: Analysis and
Observations of Long Term Office Use of
a Multi-Touch Table. Proc. Tabletop
2007, 60-67.
Hinrichs, U.,
Hancock, M., Collins, C., Carpendale, S. 2007. Examination of text-entry methods for
tabletop displays. Proc. Tabletop 2007,
105-112. “Text entry a major deficiency in multiple studies”
Ryall, K.,
Forlines, C., Shen, C., Ringel Morris, M., Everitt, K. 2006. Experiences with and
Observations of Direct-Touch Tabletops.
Proc. Tabletop 2006, 89-96.
Barrett, J.,
& Krueger, H. (1994). Performance effects of reduced proprioceptive
feedback on touch typists and casual users in a typing task. Behavior
& Information technology, 13, 373-381.
Wilson, K.S., Inderrieden,
M., & Liu, S. (1995). A comparison of five user interface devices designed
for point-of-sale in the retail industry. Proceedings
of the Human Factors & Ergonomic Society 39th Annual Meeting, 39, 273-277.
Shneiderman, B. (1998). Designing the User Interface: Strategies for Effective Human Computer
Interaction. Reading,
MA: Addison-Wesley.