[Age-related mental ability changes in industrial transport workers]

The paper presents diminishing psychic ability of transport workers in relation to their age. Seven hundred workers, who were operating transport facilities in industry, came under surveillance. The data analysed revealed that the decline in some mental functions began as early as in the age of thirty. A sharp decline was observed in men over fifty years of age. It affected non-verbal intelligence, power of concentration, spacio-motional imagination. The low level of these functions might increase the worker's liability to accidents.