Final answer:
Observing the emotions of others can affect a person's own emotional state through emotional contagion and empathy.
Step-by-step explanation:
Observing the emotions of others can affect a person's own emotional state. This is because emotions are contagious, and we often mirror the emotions we see in others. For example, if someone around us is happy and smiling, we are more likely to feel happy as well. On the other hand, if someone is sad or angry, we may also start to feel down or angry.
Another way that observing the emotions of others can affect our own emotional state is through empathy. When we see someone experiencing a certain emotion, we can put ourselves in their shoes and imagine how it would feel to be in their situation. This can evoke similar emotions in ourselves.
Overall, our own emotional state can be influenced by the emotions we observe in others, whether they are in a normal state or not.