Many
researchers
have
assumed
that
dif
ferent
methods
could
be
substituted
to
measure
the
same
attributes
in
assessment.
V
arious
models
have
been
developed
to
accommodate
the
amount
of
variance
attributable
to
the
methods
but
these
models
application
in
empirical
research
is
rare.
The
present
study
applied
one
of
those
models
to
examine
whether
method
ef
fects
were
presents
in
synonym
and
antonym
tests.
Study
participants
were
3,469
applicants
to
graduate
school.
The
instrument
used
was
the
Graduate
Academic
Potential
T
est
(P
APS),
which
includes
synonym
and
antonym
questions
to
measure
verbal
abilities.
Our
analysis
showed
that
measurement
models
that
using
correlated
trait–correlated
methods
minus
one,
CT-C(M–1),
that
separated
trait
and
method
ef
fect
into
distinct
latent
constructs
yielded
slightly
better
values
for
multiple
goodness-of-fit
indices
than
one
factor
model.
However
,
either
for
the
synonym
or
antonym
items,
the
proportion
of
variance
accounted
for
by
the
method
is
smaller
than
trait
variance.
The
correlation
between
factor
scores
of
both
methods
is
high
(r
=
0.994).
These
findings
confirm
that
synonym
and
antonym
tests
represent
the
same
attribute
so
that
both
tests
cannot
be
treated
as
two
unique
methods
for
measuring
verbal
ability
.
Many
researchers
have
assumed
that
dif
ferent
methods
could
be
substituted
to
measure
the
same
attributes
in
assessment.
V
arious
models
have
been
developed
to
accommodate
the
amount
of
variance
attributable
to
the
methods
but
these
models
application
in
empirical
research
is
rare.
The
present
study
applied
one
of
those
models
to
examine
whether
method
ef
fects
were
presents
in
synonym
and
antonym
tests.
Study
participants
were
3,469
applicants
to
graduate
school.
The
instrument
used
was
the
Graduate
Academic
Potential
T
est
(P
APS),
which
includes
synonym
and
antonym
questions
to
measure
verbal
abilities.
Our
analysis
showed
that
measurement
models
that
using
correlated
trait–correlated
methods
minus
one,
CT-C(M–1),
that
separated
trait
and
method
ef
fect
into
distinct
latent
constructs
yielded
slightly
better
values
for
multiple
goodness-of-fit
indices
than
one
factor
model.
However
,
either
for
the
synonym
or
antonym
items,
the
proportion
of
variance
accounted
for
by
the
method
is
smaller
than
trait
variance.
The
correlation
between
factor
scores
of
both
methods
is
high
(r
=
0.994).
These
findings
confirm
that
synonym
and
antonym
tests
represent
the
same
attribute
so
that
both
tests
cannot
be
treated
as
two
unique
methods
for
measuring
verbal
ability
.
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