How a memory gets made

Picture the Apple logo. Now try to sketch it on a scrap of paper without looking. Which side is the bite on? Is there a leaf, and which way does it lean?

In 2015, psychologists at UCLA asked 85 students to do exactly this. Only one of them got every detail right. Most owned an Apple device and had seen that logo thousands of times. Their memory of it was still a blur.

Seeing something is not the same as storing it. This course is about the gap between the two, and how to close it on purpose.

Attention decides what gets in

Your senses take in far more than you could ever keep. Most of it is gone within seconds, and attention is a big part of what decides. Things you focus on get a chance to be stored. Things you glance past mostly don't.

This explains a familiar embarrassment. Someone tells you their name, and ten seconds later it's gone. Often you didn't forget it at all. While they were saying it, you were planning your own introduction, so the name arrived while your attention was busy. It was never stored in the first place.

The same thing happens when you study with a buzzing phone nearby. Experiments that split people's attention while they learn find a large drop in what they remember later. Splitting attention while you recall something costs much less. The damage happens on the way in.

Meaning makes it stick

Attention gets information through the door. What you do with it next decides how well it holds.

In a classic set of experiments from the 1970s, people saw a long list of words and answered a quick question about each one. Some questions were about how the word looked, like "Is it in capital letters?" Some were about how it sounded, like "Does it rhyme with weight?" Others were about what it meant, like "Is it a kind of fish?" Nobody was asked to memorize anything. Then came a surprise memory test.

Words that people had thought about for meaning were remembered far better than words they had only checked for capital letters. Each word was on screen for the same brief moment. The only difference was the kind of thinking it got.

That idea runs through this whole course. Memory is mostly a by-product of thinking. Trying hard to remember helps less than you'd guess. You remember what you made sense of.

Try both questions about the same word. This shows two kinds of processing, not a test of how much either one improves your memory.

What this means when you study

• Before you read a section, ask what you want to find out. A question gives your attention something to hunt for.
• Put your phone out of reach while you read.
• After each section, say in your own words what it meant and how it connects to something you already know.

The UCLA students weren't careless. Their brains made a sensible bet. The rough shape of the logo was worth knowing, and the details weren't. When you study, your job is to make that bet go the other way.