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I bought a black t-shirt last week. I have five black t-shirts at home. Three of them still have the tag on.

I did not look in my wardrobe before going to the shop. I never do. The shop is easier to remember than the drawer.

Contexts: Shopping decisions, Consumption habits
Reading time: 3 minutes
Updated:

The scene

The scene

Sasha was at the shop looking at a black t-shirt. She liked it. She bought it.

When she got home, she put it in the drawer. The drawer already had four black t-shirts. Three of them still had the tag on from previous purchases she had also forgotten about.

She had not looked in the drawer before going to the shop. She never does. The shop is brightly lit and recent. The drawer is dim and forgotten.

This is the fifth black t-shirt Sasha owns. She has worn maybe two of them in the last year.

What your brain just did

What your brain just did

Our minds judge what we need based on what we can see in the moment, not on what we already own. Sasha is not wasteful. Her brain was running in reactive mode, the way it runs most of the time when we are walking through a shop. The deliberate, comparing, planning version of the mind takes effort to switch on. The reactive version just sees the t-shirt and decides. This behaviour has a name: Availability Bias.

What to do instead, in one move

What to do instead, in one move

The fix is a ten-second habit. Before any clothing purchase, picture your wardrobe. If you cannot remember what you have, take a phone photo of each drawer once a season. The photos do the remembering for you, so your reactive brain has something concrete to compare against.

TL;DR

  • Situation: You buy clothing you like in the moment. When you get home, you discover you already own similar items.
  • What your mind does: It judges what you need based on the vivid item in front of you, not on the inventory in your wardrobe (this is called Availability Bias, see below).
  • Consequence: Your wardrobe fills with duplicates. You spend money on items you already owned. Some you wear once. Some never come out of the bag.
  • What to do: Photograph each drawer once a season. Look at the photos before any clothing purchase. Ten seconds beats a duplicate.

What to do

  • Once a season, photograph the inside of each clothing drawer or shelf. Save the photos in an album titled "Wardrobe".
  • Before any clothing purchase over $20, open the album. Look at what you already own in that category.
  • For each item you are about to buy, ask: when did I last buy something similar? If less than three months ago, pause for 24 hours.
  • Sell the duplicates you already own, ideally online or at a consignment shop. If selling does not work for you, donate them. Holding them does not undo the purchase, and someone else could be wearing them.

What not to do

  • Do not rely on memory to decide what you need. Memory was made for stories, not inventories.
  • Do not justify a duplicate purchase as "this one is slightly different". Slightly different is the most expensive phrase in your wardrobe.
  • Do not buy on sale just because the price feels low. A $20 t-shirt you do not need is $20 you spent on nothing.

The shop is brightly lit and recent. The drawer is dim and forgotten. The shop wins every time you do not check the drawer first.


Want to understand why this happens?

Availability Bias is the brain's habit of using whatever information is easiest to recall as if it were the complete picture.

When Sasha was at the shop, the new t-shirt was right in front of her. Vivid, available, immediate. The four t-shirts in her drawer were not. They were a vague memory, not an active comparison.

The brain reaches for whatever is easiest to retrieve. The vivid item wins. The forgotten items lose. This is not a memory failure. It is how attention works. You cannot compare what you cannot picture.

It is not you. It is how every human brain handles purchases against unseen inventories.

What the research found

What the research found

Researchers studied how people judge frequency and probability under time pressure. The pattern is consistent: people overweight what comes to mind easily and underweight what does not. A vivid recent image beats a vague memory, even when the vague memory is the more relevant information.

The fix is to make the unseen visible. Photos of your wardrobe convert vague memory into available memory. The brain that was about to buy a duplicate is the same brain that, given the photo, says "I have four of these already".

"We trust what comes to mind easily, even when what is actually there is something else entirely." — Daniel Kahneman (paraphrased from Thinking, Fast and Slow, 2011, chapter on the availability heuristic)

This is called Availability Bias. Daniel Kahneman, Thinking, Fast and Slow (2011).

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