A method is provided which performs at least two different tests on a given child (20) at respectively at least two different ages of said child. In the course of a first test, a first information is displayed to the child and meanwhile a controller (15) acquires first data about eye movements of the child via an eye-tracking device (10) and determines a first score by comparison of said first data with first pre-recorded reference data. The same is performed in the course of a second test at a second age of said child with second information which is different from the first information, hence yielding a second score. A composite score is then calculated for said child in function of at least the first and the second scores. This composite score is a more reliable indication of a risk of neurodevelopmental disorder than indicators obtained with known methods.
