NIH research funding for these SLDs in 2000-2009 varied widely
SLD Estimated prevalence (%) NIH research funding in US $1000s
Dyslexia 4-8 27,283
Dyscalculia 3.5-6.5 1,574
ADD/ADHD 3-6 532,800
Autism spectrum disorder 1 851,270
Specific language impairment 7 28,611
Of course co-occurence of these learning disabilities occurs more often than not, however the funding for research does seem somewhat one-sided for a very small population of children.
