Pracownia Testów Psychologicznych PTP – the biggest test publisher in Poland












2021 ITC Colloguium –

Pracownia Testów Psychologicznych will be represented by Maria Rafalak


Maria Rafalak, PhD

Maria Rafalak holds a PhD in computer science and a Master’s degree in psychology. Her interdisciplinary background in both social and computational sciences helps her introduce modern psychometric methods into test construction. Maria’s main professional interests are practical applications of Item Response Theory and tests dedicated for HR purposes. She is an author of test manuals, performs statistical analyses and conducts psychometric trainings. In Pracownia since 2011.


Abstract of the speech


Requirements towards modern psychometric testing has recently been constantly growing.  Meeting the criteria of high reliability and validity are necessary but no longer sufficient conditions for meeting current market demands. Modern psychometric tools are expected to be flexible (enabling  modifying test structure to specific testing needs) and efficient (maximizing information about testee while minimizing testing session time). This becomes critical especially in organizational context where psychometric testing is often one of many elements constituting recruitment or selection process.

Proposed paper presents the development process of a new psychometric tool designed to meet the abovementioned requirements and fill the gap on the Polish psychological testing market. Results from pilot-, normalization-, and validation – studies will be discussed. Studies were carried out on a representative sample of the Polish working population (N = 1980).

MTI (Modułowy Test Inteligencji; Multi-stage Intelligence Test) is a computer-based test designed by the Polish Psychological Tests Laboratory of the Polish Psychological Association aimed to measure four types of mental abilities: numerical reasoning, verbal reasoning, spatial reasoning, analyzing information. Subtests measuring specific abilities can be administered separately depending on a testing context.

Every subtest is based on 1-3-3 Multi Stage Test (MST) design. This means a subtest consists of three stages. In the first stage there is only one set of items (module) available for administration and it is presented to every test-taker. In the second and third stage there are three modules differing in difficulty. Test-taker is presented with the adequate module based on his/her ability estimation established in the previous stage. In order to avoid item over-exposure every module in the test has its parallel version.  The version of a module is randomly selected during the subtest administration.  

Obtained results from both empirical and simulation studies show that MTI is a flexible and efficient testing method with good psychometric properties.

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