Crying refers to the act of producing tears and vocal sounds as a response to emotional or physical distress.
Emotional Expression: This term refers to the outward display of emotions through actions like crying, laughing, or shouting.
Distress: This term describes a state of extreme discomfort or suffering that can lead to crying or other emotional expressions.
A stimulus is any event or object that elicits a response from an organism. In this case, the sound of the dentist's drill acts as a stimulus for the child's crying response.