 Speech Rate (Ages 5 to 7) is an 8-item timed subtest that requires the child to repeat a string of 3 common words, such as dog-girl-book, over and over again as fast as possible until asked to stop.The score is the time it takes the child to complete 10 repetitions before stopping.CAS is used for understanding cognitive development of typical and atypical children, as well as cognitive impairment in adults.