Final answer:
The nurse should sit 18 inches to 4 feet from the patient during an admission interview to respect personal space and foster good communication.
Step-by-step explanation:
To maintain the patient's territoriality and maximize communication, during an admission interview the nurse should sit 18 inches to 4 feet from the patient. This distance allows for a personal connection without invading the personal space that the patient might perceive as threatening. This spacing aligns with maintaining an arm's length of space, which is generally comfortable for both parties, and also respects cultural differences and personal preferences.