Translation of "신호에" in English

외로운 사람들은 사회적 신호에 더 민감해

So people who are lonely are actually more sensitive to social cues.

쥐들은 더 이상 공포를 촉발하는 신호에 반응하지 않았습니다.

It was as if they had never learned to be afraid of that cue.