Ryan Katz

Have you ever been falsely accused of something? This week, why we sometimes act against our own self-interest — even when the stakes are at their highest.

The human drive to invent new things has led to pathbreaking achievements in medicine, science and society. But our desire for innovation can keep us from seeing one of the most powerful paths to progress: subtraction. Engineer Leidy Klotz says sometimes the best way forward involves removing, streamlining and simplifying things.

Anthropologist Tom Pearson was devastated after his daughter Michaela was diagnosed with Down syndrome. When he began to examine that emotional response, he found himself wrestling with questions that have roiled his field for decades. Early anthropologists would often compare people of different backgrounds and abilities, asking questions like: How is one group different from another? Which one is stronger or smarter? And how do we understand people who don’t fit our expectations? This week, we talk with Pearson about his family’s story, and the evolution of our thinking on disability and difference.

We rely on our memory to understand the world. But what if our memories aren’t true? This week we talk to psychologist Elizabeth Loftus about the malleability of memory – what we remember, and what we think we remember.

We’ve all heard the saying, “What doesn’t kill you makes you stronger.” But is there any truth to this idea? This week, we explore the concept of post-traumatic growth with psychologist Eranda Jayawickreme. He finds that suffering can have benefits — but not necessarily the ones we expect.

One of the mysteries of human behavior is that it’s often easier to focus on what’s going wrong than on what’s good in our lives. Why is that? Psychologist Thomas Gilovich studies the barriers that prevent us from feeling gratitude, and how we can overcome them.

Think about the last time you did something you knew was wrong. How did you explain your actions to yourself? All of us tell stories about why we do the things we do. We justify our failures, and come up with plausible explanations for our actions. This week, Elliot Aronson explains the mental processes behind this type of self-justification, and shares how he helped develop one of the most widely-known concepts in psychology: cognitive dissonance.