Long-Term Language Outcomes and Processing in Adults Aged 30-35 With or Without Developmental Language Disorder Using Eye-Tracking

What this Trial Is About

Researchers are studying adults aged 30 to 35 who have Developmental Language Disorder DLD or typical language skills to understand the long-term outcomes and cognitive mechanisms related to DLD. They use data from the Iowa Longitudinal Study, which followed participants from kindergarten through 10th grade, to examine language abilities over time and how they differ in adulthood. The study aims to see how language skills develop or change in adults with DLD and to explore how real-time language processing might explain these differences. Participants complete behavioral tasks involving eye-tracking to observe how they process written and spoken language in real time. These tasks measure how quickly and accurately participants identify target images or words compared to similar competing items. Two groups participate adults with below-average language skills DLD and adults with typical language skills. The study involves six eye-tracking tasks that assess language processing at multiple levels. During the study, participants eye movements are tracked while they perform language tasks lasting about two hours. Researchers collect detailed language measures to understand individual differences and developmental trajectories. The study evaluates both retrospective data from childhood and new assessments in adulthood to analyze language abilities, processing speed, and competition dynamics. This observational study continues until July 2027 and includes adults with normal or corrected vision and hearing.

Language Outcomes, Mechanisms, and Trajectories in Adults With and Without Developmental Language Disorder