AN
INTERPRETIVE PROFILE
FOE
THE SLOSSON INTELLIGENCE
TEST
MARK
STONE
CY'B/McGraw
Hill,
Chicago
The Slosson 1nt)elligence Test
(SIT)
is
:in
age
scale of intelligence with demon-
st
rated reliability and high validity coefficients correlated
1.0
the Stanford-
Binet. The items of the
SIT
were classified according t.o a scheme resembling
Valett's classification of Stanford-Binet test, items.
A
comparison
of
the clas-
sifications was made
and
an explanation given
of
how
the interpretive profile
can
be used
to
enhance the value
of
the
SIT.
The Slosson Intelligence Tcst
(SIT)
purports to assist thc busy practitioncr
in assessment. The
SIT
is
an
easily administcrcd individual intelligencc test that
requires approximately
15
to 20 minutes to administer and only a fcw minutes to
score. This test, likc any othcr intclligencc tcst, still requires skill in testing for
its proper administration, but it does have thc advantage of not requiring the
thorough training necessary for administering thc Stanford-Binct
or
Wechslcr
Scales. This makes
it
useful to support pcrsonnel for screening and helpful to
speech therapists, counselors and reading specialists.
METHOD
The format of the
SIT
is
similar to the Stanford-Binet.
It
is an age scale
consisting of graded test questions from year 2 to year 27. The raw score is con-
verted to a mental age and then to a ratio I&.
In
a
sample
of
45
subjects ranging in age from 16 to 62, representing
I&
ranges
from mild retardation to bright normal and a wide range of psychiatric impairments,
Icaufman (1969) found
a
correlation of
.93
between the SIT and WAIS full scale
I&.
The test manual reports reliability coefficients in the
.9Os,
which are coefficients
of stability for a 2-month period with concurrent validity coefficients in the .9Os
also. At the lower end
of
the scale (below two ycars) the
SIT
correlated .70 with
Cattell's Infant Intelligence Scale. Other tables in the manual give other samples
comparing the SIT to the WISC and WAIS.
Slosson mentions the need to consider the scatter of successes and failures in
interpreting the results.
Thc
answer sheet shows the configuration of plus and
minus marks.
If
scatter is to bc informative
it
must be more thoroughly examined.
A
method for examining the scatter of responses on the
SIT
could provide greater
insight into the value of thc
SIT
itself and also aid in interpretation. A supplemental
form
was
developed from item classification as
a
convenient way to examine per-
formance on the SIT. The scoring of the SIT requires
so
little time that a few
minutcs devoted to further analysis of the performance will make the SIT more
valuable.
Valett's (1965) classification of Stanford-Binet items served as a guide. He
classified the items according to a classification scheme and published an interpretive
chart. This approach is not new, however. Roe and Shakow (1942), Fromm (1960)
and Sattler (1965) had earlier classified the Binet test items.
liequests for reprints should be sent
to
Mark Stone, CTB/McGraw Hill, Chicago, Illinois.