"Personal interaction" refers to the way people communicate or engage with each other through direct contact and conversation, either face-to-face or through other means like phone calls or video chats. Full definition
Some studies show how a lack of personal interaction with the teacher can negatively affect student motivation [4]. (elearnmag.acm.org)
Maintaining good employee and labour relations through effective face time and having a good amount of personal interaction with employees. (dayjob.com)
Keep him busy with interactive food puzzle toys when he's alone, and provide him with plenty of personal interaction in the evening. (cuteness.com)