Any autosomal recessive non-syndromic intellectual disability in which the cause of the disease is a mutation in the GRIK2 gene. The disease is Monarch Disease Ontology identifier MONDO_0012614 (intellectual disability, autosomal recessive 6). Also known as: GRIK2 autosomal recessive non-syndromic intellectual disability, autosomal recessive non-syndromic intellectual disability caused by mutation in GRIK2, intellectual developmental disorder, autosomal recessive 6, intellectual disability, autosomal recessive type 6, mental retardation, autosomal recessive type 6.