Fig. 1A–E.

Loess scatterplots of the association between age and performance on the modified Cued Recall Test (A), Block Design Tasks (B), Down Syndrome Mental Status Exam (DSMSE) (C), Dementia Questionnaire for People with Learning Disorders (DLD) sum of cognitive score (D) and DLD sum of social score (E) by premorbid level of intellectual disability. The first dashed vertical line is the mean age of the cognitively stable group and the second line is the mean age of those with mild cognitive impairment (MCI) or dementia.