Trajectories and profiles of adaptive behavior in males with fragile X syndrome: multicenter studies.

Researchers tracked 186 boys with fragile X for up to 20 years. They used the Vineland Adaptive Behavior Scales every year. The boys came from four medical centers across the United States.

The team wanted to see how daily living, communication, and social skills changed over time. They split the boys into three age groups: 1-10 years, 11-20 years, and 21-30 years.

Skills grew fast before age 10. Daily living skills like brushing teeth improved the most. Communication skills improved the least.

From 11 to 20 years, growth stopped. Scores stayed flat. After age 21, skills held steady. The gap between daily living and communication skills got bigger with age.

Gaylord-Ross et al. (1995) studied teens with mild intellectual disability. They found motivation matters during the plateau years. This matches E et al.'s flat scores from 11-20 years.

Lyall et al. (2012) showed that higher ability toddlers with ASD had more behavior problems. This seems different from E et al.'s findings. But Kristen studied challenging behaviors, not adaptive skills. The papers look at different outcomes.

Matson et al. (2008) created cut-off scores for social skills in adults with severe ID. Their work helps the endpoint of E et al.'s trajectory. Together they show the full lifespan picture.

Plan intensive teaching before age 10 when learning is fastest. During the teen plateau, focus on maintaining skills and building motivation. Use adult scores as realistic long-term targets. This helps you set age-appropriate goals and explain progress to families.