Final answer:
The physical therapist assistant failed to seek feedback from the patient after giving exercise instructions, which is a necessary step to ensure the exercise is understood and performed correctly.
Step-by-step explanation:
The physical therapist assistant missed an important step in the communication process, which is the need for feedback. Feedback is critical to ensure the patient understands the instructions and is performing the exercise correctly.
In practical exercises like praxis, where a patient performs tasks based on verbal instructions, it is essential for the physical therapist to observe the patient's actions and provide corrections or guidance as needed. Without watching the patient execute the exercise or asking for the patient to confirm their understanding, the therapist cannot be sure if the instructions were clear or if the movements are being done accurately and safely.