['Early diagnosis is necessary in order to determine neurological integrity and the potential risk of improper development, and also to undertake possible early intervention. The quantitative assessment consists of observation of motor development, and provides information about whether a child performs an activity (movement) expected at a given life period. The qualitative assessment of motor performance verifies whether a specific activity is performed properly. The papers aims to demonstrate the motor performance assessment sheet for infants at the age of 6 months and assessment of qualitative elements of 3rd month at the age of 6 months.', '173 infants (76f/97m) were assessed by a neurologist and a physiotherapist at the age of 6 and 9 months. The neurologist set the final diagnosis at the age of 16 months. Additionally, the physiotherapist assessed qualitative elements typical of the 6th month and of the 3rd month. Risk factors possibly affecting motor performance were considered.', 'The assessment performed by the neurologist and the physiotherapist demonstrated high conformity. Infants with varying degrees of developmental delay and with cerebral palsy at the age of 6 months have still not achieved all of the qualitative characteristics typical of the 3rd month of life, nor proper performance for the 6th month. The low Apgar score and the presence of intraventricular haemorrhage affected the motor development at the age of 6 months.'] Does qualitative motor assessment allow to predict the degree of motor disturbances?