Intelligence Structure Tests (IST)
PURPOSE
This battery of short online tests measures: Verbal,
Numerical and Figural intelligence.
AUTHOR
Beauducel, A., Liepmann, D., Horn, S., Brocke, B.
DESCRIPTION
The battery measures Verbal, Numerical and Figural intelligence.
Each area of intelligence is assessed through three sub-tests.
The Verbal Intelligence sub-tests are: Sentence Completion, Verbal Analogies and Similarities.
The Numerical Intelligence sub-tests are: Numerical Calculations, Number Series and Numerical Signs.
The Figural Intelligence sub-tests are: Figure Selection, Cubes and Matrices.
The inclusion of three sub-tests in each area means that several different types of item are used to measure each area. Thus the battery avoids the error of simply equating one particular type of item with an individual area of ability.
When all nine sub-tests are administered, an overall score for reasoning is computed along with separate scores for each ability area and the sub tests within that area.
This version of IST contains the verbal, numerical and figural/spatial ability modules:
| Module |
Sub test |
Duration |
| Verbal |
Sentence completion |
6 minutes |
| Verbal analogies |
7 minutes |
| Verbal similarities |
8 minutes |
| Numerical |
Calculations |
10 minutes |
| Number series |
10 minutes |
| Numerical signs |
10 minutes |
| Figural |
Figure selection |
7 minutes |
| Cubes |
9 minutes |
| Matrices |
10 minutes |
Sub-tests may be administered individually. To obtain a score for a given module, all three sub tests must be completed.
For online administration, the sub-tests are selected in a configuration window as shown here, click here for larger image.
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The following additional components of the complete battery are currently being developed for the UK edition:
Verbal memory
Figural memory
Logical thinking
Figural-visual knowledge
Numerical knowledge
General knowledge
The complex structure on which the battery is based is reported in Beauducel, Brocke and Liepmann (2001) and Liepmann, Beauducel, Brocke and Amthauer (2007). The full battery also differentiates fluid intelligence and crystallised intelligence. The IST thus allows intellectual abilities to be assessed in a contemporary and well-differentiated manner.
The battery can be administered individually or in a group setting. The UK version is currently only available for on-line administration and scoring. A paper and pencil version is in development.
RELIABILITY
Internal consistencies (Cronbach’s alphas) range from .86 to .95 for the factor scores with an internal consistency of .95 for the Total Reasoning score.
Internal consistencies for the subscales range from .69 to .79 (Verbal sub-scales), .86 to .91 (Numerical sub-scales) and .76 to .82 (Figural subscales). Co-efficients are presented separately for the males and females as well as for the total sample.
VALIDITY
Item-total correlations and difficulty levels are presented for each item
Confirmatory factor analysis supports a three factor solution. The Factor correlations indicate that a second order factor representing reasoning can be formed.
Evidence of validity is derived by means of multivariate analyses. Correlations with other assessment instruments (d2 test, WAIS-R, MWT-BV, CFT20 and FRT) as well as with school performance indicate convergent and discriminant validity.
NORMS
The total normative sample consisted of 1894 cases from 15 to 69 years. Age specific norms are provided. The sample came from England (London and Leeds), Ireland and Wales. It comprised male and female schoolchildren, apprentices, students and professionals from various
DURATION
Depending on which modules are used, time can range from 77 minutes (basic module) to 130 minutes
To place an order - please phone 0118 9482322 or email info@cranbrooksolutions.co.uk
TEST MATERIALS |
£
|
| IST Online administration & report generation (HTS) |
12.00
|
| IST Full Bureau service provides administration, produces report and feedback on your behalf, excludes cost of test. |
38.00
|
Hover over the icons below to see how this test
is administered, scored and marked
