Building on an existing open
source web
implementation of Tetris
1
(Figure
2
)
, we modified
traditiona
l Tetris rules to offer an incentive for learning
word
-
picture associations. Players see each Tet
ris block
attached to a picture
and must correctly speak the
word associated with the picture before block rotation
can be unlocked for the trial (Figure
3
).
We selected
this particular rule modification because it most closely
aligns word
-
learning incentives with the core means to
success in the original game.
We enhance
d
traditional Tetris with multimodal speech
interaction for two reasons. First, prior rese
arch in
speech
-
based literacy games has indicated that
productive speech practice strengthens word knowledge
by providing learners with phonological input back to
the mind
[7
]. Secondly, because arcade games like
Tetr
is are already fast
-
paced and involve
m
ultiple
keystrokes in controlling game pieces, speech
interaction allows players to keep up with
the pace
of
the game
more so than textual input
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