Review of the IDS-2


The normalization process for the Polish version of the IDS-2 (Intelligence and Development Scales for Children) is coming to an end. All test materials are already available for purchase (aiding materials, sheets, keys and test booklets). Test manuals will be available in the first quarter 2019.

Three IDS-2 manuals are planned: Theoretical Foundation, Psychometric Features, Interpretation (Manual 1), Administration and Scoring (Manual 2) and Tables of Norms (Manual 3). The manuals have already been reviewed by Prof. Barbara Szmigielska-Siuta from the Institute of Psychology, Jagiellonian University. A few passages of the review are interesting enough to be worth sharing with our customers.

Prof. Szmigielska-Siuta pays attention to the lively interest in the Scales among psychologists. Being a relatively new tool (the original version was prepared by the Swiss psychologists in 2015 and published in 2018) it was already adapted in 13 countries.  

We should be glad, therefore – Prof. Szmigielska-Siuta writes – that Poland so quickly becomes one among the test users.

Rewieving each manual what is especially commendable in the reviewer's eyes is detailed descriptions of the tool's theoretical fundations. She emphasizes very reliable data included in the manual related to the Scales' psychometric features and various correlates measured by the IDS-2 variables.

The reviewer finds remarkably clear the presentation of the tool structure in tables which takes into account children's and youth's functioning spheres as measured by the IDS as well as factors, test names and, finally, task numbers and descriptions.

The structure of the tool was described very clearly:  

What should be highly praised is the introduction of the unified scheme to present issues related to each sphere: theory, development and modifications, correlations with other variables. With that scheme the reader receives clear knowledge on every sphere of the subjects' functioning which s/he can no doubt fruitfully apply in the interpretation of their scores.

Especially appreciated by the reviewer were the chapters devoted to the interpretation:  

Principles of interpretaion were presented in a very reliable and detailed way. With them the test user becomes familiar not only with the significance of high or low scores in various tests (and tasks) but also with correlates of skills measured by those tests. Moreover the authors each time define how a given factor measured on the IDS-2 should be understood.

There are separate remarks in the review on the manual's passages describing possible IDS-2 applications in the assessment of disabled persons. The reviewer appreciates the fact that besides recommendations concerning the IDS application in the intelligence testing or in rating strong and weak points of intellectually disabled children the authors give a detailed account of problems assessed children encountered in particular tasks. This is a valuable source of information for all potential researchers and examiners using the IDS-2 in the disabled persons' assessment.

Several small critical remarks were also included in the review – they will be duly taken into account in the final editing – but we are glad that the overall impression after reading the manuals is so positive.

The IDS-2 has many advantages. First, it is a tool with a broad range of possible applications. In the Polish normalization study it was proved that it can be applied to: 1. assess intelectually disabled individuals, 2. diagnose individuals with poor school performance, 3. diagnose persons with a suspicion of dyslexia, 4. to diagnose school maturity. From the research on the IDS-2 original version it may be concluded, moreover, that the tool proves useful in the examination of: 5. individuals with outstanding skills, 6. individuals with ADHD and 7. individuals with autism spectrum disorders. Second, it is possible to apply the IDS-2 in the modular way....Third, the IDS-2 allows to assess individuals in various periods of their lives (mid- and late childhood, early and late adolescence) which are extremely important for the development and its possible disturbances. Fourth, the test can be applied for screening the purpose of which is to identify children with outstanding skills but also those socially neglected. Fifth, the IDS-2 can be applied for individual assessment aimed at the search of strong and weak points in the child's development. Sixth, the IDS-2 has come to be adapted in many countries which makes possible the use of Polish children's scores in international comparative research.

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