Purpose of the Questionnaire (Scale)

The KFT-K is a non-verbal psychometric tool designed for the assessment of general intelligence in children aged 5 to 6 years. It is intended for preschool children, kindergarten students, as well as researchers working in the field of early childhood. It evaluates four key cognitive domains and is used by psychologists and educators for developmental assessment.

Questionnaire (Scale) Analysis

The test was originally created by Heller and Geisler in 1983, while the Greek adaptation was made by K. Mavropoulos. It consists of a total of 60 questions, each scored on a binary scale (correct or incorrect). The questions are evenly distributed across four subscales, which represent core domains of cognitive development: Language Comprehension, Relationship Comprehension, Inductive Reasoning, and Numerical Logic. Each subscale includes 15 questions.

Scoring of Questions

Scoring is done by awarding 1 point for each correct answer. The score for each subscale is the sum of correct responses (ranging from 0 to 15), while the total score is the sum of all subscales, ranging from 0 to 60. The total score is then converted into a standardized score based on the child’s age, as specified in the test manual. For example, a score of 12 out of 15 in the Numerical Logic subscale indicates strong early mathematical skills.

Statistical Analysis

The interpretation of the total score is as follows:
Scores from 0 to 20 indicate below-average cognitive development.
Scores from 21 to 40 reflect average cognitive development.
Scores from 41 to 60 show above-average cognitive development.

Validity of the Questionnaire (Scale)

The construct validity of the KFT-K has been confirmed through high correlation with the Stanford-Binet Intelligence Scales (r = 0.78). The original validation was conducted by Heller and Geisler in 1983, while Greek adaptation and validation studies are recorded or anticipated.

Reliability of the Questionnaire (Scale)

The test demonstrates high internal consistency, with α = 0.89 in the original version. It also shows stability in repeated measurements, with a test-retest reliability coefficient of r = 0.85 over a four-week period.

References

Greek References
Mavropoulos, K.
International References
Heller, K. & Geisler, H.J. (1983). Kognitive Fähigkeits-Test (Kindergartenform). Beltz Test GmbH
Keywords
Assessment of cognitive abilities, preschool test, intelligence test, non-verbal test, developmental psychology, psychometrics