4. No Comprehension Problems
As mentioned above, many speech problems involve issues with comprehending words or ideas. However, apraxia specifically deals with motor difficulties in actually forming words, phrases, and sentences. One way to tell whether a speech a problem has to do with motor abilities or comprehension issues is if the person shows that they absolutely understand what is being said, but cannot form coherent verbal responses.
Therefore, someone with apraxia may be able to text flawlessly or write notes back and forth, but they will not be able to tell you verbally what they are thinking.
On the other hand, people with damage to the brain that affects their ability to comprehend will not show signs of understanding in addition to not being able to respond verbally. People with apraxia can be highly functioning because of their ability to understand provided that they can communicate in other ways, such as typing.