<s>
Rodger	B-General_Concept
's	I-General_Concept
method	I-General_Concept
is	O
a	O
statistical	O
procedure	O
for	O
examining	O
research	O
data	O
post	O
hoc	O
following	O
an	O
'	O
omnibus	O
 '	O
analysis	O
(	O
e.g.	O
,	O
after	O
an	O
analysis	B-General_Concept
of	I-General_Concept
variance	I-General_Concept
–	O
anova	B-General_Concept
)	O
.	O
</s>
<s>
Rodger	B-General_Concept
's	I-General_Concept
method	I-General_Concept
,	O
and	O
some	O
others	O
,	O
are	O
classified	O
according	O
to	O
these	O
dimensions	O
in	O
the	O
table	O
below	O
.	O
</s>
<s>
In	O
early	O
1990s	O
,	O
one	O
set	O
of	O
researchers	O
made	O
this	O
statement	O
about	O
their	O
decision	O
to	O
use	O
Rodger	B-General_Concept
's	I-General_Concept
method	I-General_Concept
:	O
“	O
We	O
chose	O
Rodger	O
’s	O
method	O
because	O
it	O
is	O
the	O
most	O
powerful	O
post	O
hoc	O
method	O
available	O
for	O
detecting	O
true	O
differences	O
among	O
groups	O
.	O
</s>
<s>
The	O
most	O
definitive	O
evidence	O
for	O
the	O
statistical	O
power	O
advantage	O
that	O
Rodger	B-General_Concept
's	I-General_Concept
method	I-General_Concept
possesses	O
(	O
as	O
compared	O
with	O
eight	O
other	O
multiple	O
comparison	O
procedures	O
)	O
is	O
provided	O
in	O
a	O
2013	O
article	O
by	O
Rodger	O
and	O
Roberts	O
.	O
</s>
<s>
On	O
this	O
matter	O
,	O
the	O
facts	O
about	O
Rodger	B-General_Concept
's	I-General_Concept
method	I-General_Concept
are	O
straightforward	O
and	O
unequivocal	O
.	O
</s>
<s>
Rodger	B-General_Concept
's	I-General_Concept
method	I-General_Concept
permits	O
an	O
absolutely	O
unlimited	O
amount	O
of	O
post	O
hoc	O
data	O
snooping	O
and	O
this	O
is	O
accompanied	O
by	O
a	O
guarantee	O
that	O
the	O
long	O
run	O
expectation	O
of	O
type	O
1	O
errors	O
will	O
never	O
exceed	O
the	O
commonly	O
used	O
rates	O
of	O
either	O
5	O
or	O
1	O
percent	O
.	O
</s>
<s>
It	O
is	O
the	O
average	O
number	O
of	O
such	O
errors	O
over	O
the	O
long	O
run	O
that	O
Rodger	B-General_Concept
's	I-General_Concept
method	I-General_Concept
guarantees	O
cannot	O
exceed	O
Eα	O
=	O
0.05	O
or	O
0.01	O
.	O
</s>
<s>
This	O
statement	O
is	O
a	O
logical	O
tautology	O
,	O
a	O
necessary	O
truth	O
,	O
that	O
follows	O
from	O
the	O
manner	O
in	O
which	O
Rodger	B-General_Concept
's	I-General_Concept
method	I-General_Concept
was	O
originally	O
conceived	O
and	O
subsequently	O
built	O
.	O
</s>
<s>
Type	O
1	O
error	O
rate	O
inflation	O
is	O
statistically	O
impossible	O
with	O
Rodger	B-General_Concept
's	I-General_Concept
method	I-General_Concept
,	O
but	O
every	O
statistical	O
decision	O
a	O
researcher	O
makes	O
that	O
might	O
be	O
a	O
type	O
1	O
error	O
will	O
either	O
actually	O
be	O
one	O
or	O
it	O
wo	O
n't	O
.	O
</s>
<s>
The	O
two	O
features	O
of	O
Rodger	B-General_Concept
's	I-General_Concept
method	I-General_Concept
that	O
have	O
been	O
mentioned	O
thus	O
far	O
,	O
its	O
increased	O
statistical	O
power	O
and	O
the	O
impossibility	O
of	O
type	O
1	O
error	O
rate	O
inflation	O
when	O
using	O
it	O
,	O
are	O
direct	O
by-products	O
of	O
the	O
decision-based	O
error	O
rate	O
that	O
it	O
utilizes	O
.	O
</s>
<s>
There	O
is	O
a	O
unique	O
aspect	O
of	O
Rodger	B-General_Concept
's	I-General_Concept
method	I-General_Concept
that	O
is	O
statistically	O
valuable	O
and	O
is	O
not	O
dependent	O
on	O
its	O
decision-based	O
error	O
rate	O
.	O
</s>
<s>
Since	O
the	O
inception	O
of	O
Rodger	B-General_Concept
's	I-General_Concept
method	I-General_Concept
,	O
some	O
researchers	O
who	O
use	O
it	O
have	O
had	O
their	O
work	O
published	O
in	O
prestigious	O
scientific	O
journals	O
,	O
and	O
this	O
continues	O
to	O
happen	O
.	O
</s>
<s>
A	O
very	O
different	O
desired	O
outcome	O
for	O
Rodger	B-General_Concept
's	I-General_Concept
method	I-General_Concept
was	O
conveyed	O
in	O
this	O
statement	O
by	O
Roberts	O
:	O
"	O
Will	O
Rodger	O
’s	O
method	O
continue	O
to	O
be	O
used	O
by	O
only	O
a	O
few	O
researchers	O
,	O
become	O
extinct	O
,	O
or	O
supplant	O
most	O
or	O
all	O
of	O
the	O
currently	O
popular	O
post	O
hoc	O
procedures	O
following	O
ANOVA	B-General_Concept
?	O
</s>
<s>
The	O
possible	O
futures	O
for	O
Rodger	B-General_Concept
's	I-General_Concept
method	I-General_Concept
mentioned	O
in	O
the	O
two	O
previous	O
paragraphs	O
are	O
therefore	O
not	O
exhaustive	O
,	O
and	O
the	O
possibilities	O
on	O
a	O
more	O
comprehensive	O
list	O
are	O
no	O
longer	O
mutually	O
exclusive	O
.	O
</s>
