11. Specific (developmental) learning disabilities

11.1. SLD - occurrence of faults

occurrence in the population affects:

  • type of fault
  • language structure
  • sex
  • age
  •   methods of school teaching spelling and reading
  •   aggravating health, psychological and social influences
  •   degree of educational pressure
  • level of diagnostic and corrective care
  • the most frequently given figure is 2–20%
  • in the adult population: USA up to 20%, Germany and the Czech Republic 9%

severe disorders (most often related to brain damage) - independence from linguistic, cultural and socio-economic influences 1-2%

  • the difference in incidence between boys and girls in the ratio 4: 10: 1