Studies have found that in children ages 4–6 there is less disturbance of speech than in children ages 7–9 under a delay of 200 ms. Younger children are maximally disrupted around 500 ms while older children around 400 ms. A 200 ms delay produces maximum disruption for adults.
Research has demonstrated that speech is less affected in children aged 4–6 than in those aged 7–9 with a 200-millisecond delay. Younger children exhibit maximum disruption at approximately 500 milliseconds, while older children experience it around 400 milliseconds. A 200-millisecond delay results in the most disruption for adults.