Table 1.

Characterization of the 3-class model of individuals with DS (N = 314; 6–25 years) based on the variability observed in cognitive and behavioral measures, identified by Channell et al. (23) using a latent profile analysis.

	3-class model proposed by Channell et al. (23)
	Normative class	Cognitive class	Behavioral class
Number of participants	N = 153 (48%)	N = 109 (35%)	N = 52 (17%)
Strengthens (relative to sample average)	Cognitive skills (IQ, visuospatial abilities), adaptive behavior, executive function	–	Cognitive skills (IQ, visuospatial abilities), adaptive behavior
Weaknesses (relative to sample average)	–	Cognitive skills (IQ, visuospatial abilities), executive function, adaptive behavior, maladaptive behavior (ASD, hyperactivity)	Maladaptive behavior (ASD), executive function

ASD, autism spectrum disorder; IQ, intelligence quotient.