Say Cheese: Why Do Americans Smile So Much? (Atlantic)

It turns out, immigration and cultural values affect how much people smile. Historically, countries with greater immigration have relied more on nonverbal communication. Emotional expressiveness also correlates with diversity, meaning when people do not speak the same language they are more likely to smile to build trust and cooperation. These cultural differences also contribute to difficulties American companies face when expanding overseas. Read more in The Atlantic.

Talking to Yourself Can Help You Learn (Harvard Business Review)

People who practice self-explaining, a learning strategy revolving around asking oneself explanatory questions out loud, learn three times as more than people who don’t. Talking to yourself slows down your thought process and prompts you to concentrate. The act of explaining and questioning encourages you to make less obvious connections. Read more in Harvard Business Review.