<s>
PEBL	B-Application
(	O
Psychology	O
Experiment	O
Building	O
Language	O
)	O
is	O
an	O
open	O
source	O
software	O
program	O
created	O
by	O
Shane	O
T	O
.	O
Mueller	O
that	O
allows	O
researchers	O
to	O
design	O
and	O
run	O
psychological	O
experiments	O
.	O
</s>
<s>
It	O
runs	O
on	O
PCs	O
using	O
Windows	O
,	O
OS	O
X	O
,	O
and	O
Linux	B-Application
,	O
using	O
the	O
cross-platform	O
Simple	B-Operating_System
DirectMedia	I-Operating_System
Library	I-Operating_System
(	O
libSDL	B-Operating_System
)	O
.	O
</s>
<s>
PEBL	B-Application
is	O
a	O
programming	O
language	O
that	O
allows	O
users	O
to	O
create	O
experiments	O
by	O
editing	O
text	O
files	O
.	O
</s>
<s>
It	O
is	O
written	O
in	O
C++	B-Language
,	O
with	O
a	O
language	O
parser	O
designed	O
using	O
Flex	B-General_Concept
and	O
Bison	B-Application
.	O
</s>
<s>
It	O
incorporates	O
functions	O
compiled	O
as	O
C++	B-Language
code	I-Language
that	O
can	O
be	O
used	O
in	O
PEBL	B-Application
,	O
as	O
well	O
as	O
a	O
large	O
number	O
of	O
functions	O
written	O
in	O
PEBL	B-Application
itself	O
.	O
</s>
<s>
PEBL	B-Application
supports	O
presenting	O
stimuli	O
via	O
text	O
,	O
images	O
,	O
movies	O
,	O
audio	O
files	O
;	O
allows	O
response	O
collection	O
via	O
keypress	O
,	O
mouse	O
,	O
joystick	O
,	O
and	O
specialized	O
hardware	O
devices	O
;	O
and	O
supports	O
a	O
number	O
of	O
networking	O
and	O
communication	O
protocols	O
.	O
</s>
<s>
The	O
PEBL	B-Application
system	O
and	O
related	O
files	O
have	O
been	O
downloaded	O
more	O
than	O
100,000	O
times	O
.	O
</s>
<s>
As	O
well	O
as	O
allowing	O
researchers	O
to	O
develop	O
their	O
own	O
experiments	O
,	O
PEBL	B-Application
includes	O
a	O
set	O
of	O
more	O
than	O
50	O
common	O
psychological	O
testing	O
paradigms	O
as	O
part	O
of	O
its	O
Test	O
Battery	O
.	O
</s>
