<s>
Relief	O
is	O
an	O
algorithm	O
developed	O
by	O
Kira	O
and	O
Rendell	O
in	O
1992	O
that	O
takes	O
a	O
filter-method	O
approach	O
to	O
feature	B-General_Concept
selection	I-General_Concept
that	O
is	O
notably	O
sensitive	O
to	O
feature	O
interactions	O
.	O
</s>
<s>
Relief	O
calculates	O
a	O
feature	O
score	O
for	O
each	O
feature	O
which	O
can	O
then	O
be	O
applied	O
to	O
rank	O
and	O
select	O
top	O
scoring	O
features	O
for	O
feature	B-General_Concept
selection	I-General_Concept
.	O
</s>
<s>
Relief	O
feature	O
scoring	O
is	O
based	O
on	O
the	O
identification	O
of	O
feature	O
value	O
differences	O
between	O
nearest	B-Algorithm
neighbor	I-Algorithm
instance	O
pairs	O
.	O
</s>
<s>
The	O
original	O
Relief	O
algorithm	O
has	O
since	O
inspired	O
a	O
family	O
of	O
Relief-based	O
feature	B-General_Concept
selection	I-General_Concept
algorithms	O
(	O
RBAs	O
)	O
,	O
including	O
the	O
ReliefF	O
algorithm	O
.	O
</s>
<s>
STIR	O
reformulates	O
and	O
slightly	O
adjusts	O
the	O
original	O
Relief	O
formula	O
by	O
incorporating	O
sample	O
variance	O
of	O
the	O
nearest	B-Algorithm
neighbor	I-Algorithm
distances	O
into	O
the	O
attribute	O
importance	O
estimation	O
.	O
</s>
<s>
Different	O
RBAs	O
have	O
been	O
applied	O
to	O
feature	B-General_Concept
selection	I-General_Concept
in	O
a	O
variety	O
of	O
problem	O
domains	O
.	O
</s>
