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The Differential Diagnostic Questionnaire (DDQ) by E.A. Klimov is widely used in career guidance to identify aptitudes for five types of professions. Answer 20 questions and discover which field of activity best matches your natural abilities and interests.

Your dominant professional type according to Klimov's classification
A full profile of aptitudes across five profession types
A list of suitable professions for your type
Fields of activity where you will be most successful
Recommendations for choosing a career path
E.A. Klimov publishes the classification of professions by the object of work
Creation of the Differential Diagnostic Questionnaire (DDQ)
Book 'How to Choose a Profession' describing the methodology
Updated edition 'Psychology of Professional Self-Determination'
Methodology included in the standard of career guidance in Russian schools
The Differential Diagnostic Questionnaire by E.A. Klimov is based on the classification of professions by the object of work. According to Klimov's theory, all professions can be divided into five types: Person–Nature, Person–Technology, Person–Person, Person–Sign System, and Person–Artistic Image.
Each type describes a specific class of objects that a specialist interacts with during work. The methodology has been standardized on samples of students and adults, demonstrates stable test-retest reliability (r = 0.73–0.
86), and is used in career guidance centers, school psychology services, and HR practice. The questionnaire is included in the recommended list of diagnostic tools by the Russian Ministry of Education and is described in over 200 scientific and methodological publications.
The test determines your aptitude for five types of professions: Person–Nature, Person–Technology, Person–Person, Person–Sign System, and Person–Artistic Image. You will receive a profile with specific career recommendations.
The test consists of 20 pairs of statements and takes about 10 minutes. It is recommended to take it in a calm environment without rushing.
The test is suitable for high school students aged 14 and older, university students, and adults choosing a profession or planning a career change.
The Klimov DDQ methodology has a test-retest reliability of 0.73–0.86, which is considered a high indicator. Accuracy depends on the honesty of your answers.
Yes, most people have two or three pronounced types. This is normal and means that professions at the intersection of several fields may suit you well.
In each of the 20 questions you are offered two types of activities. Choose the one that appeals to you more. Answer honestly: there are no right or wrong answers.
Over 1500 scientifically validated tests. Completely free and no registration required.