Goldfish forget everything after three seconds.
for grown-ups
What's actually true
The "three-second memory" is a saying, not a finding. In a well-known University of Plymouth study, goldfish learned to push a lever for food, and then learned which one hour of the day the lever worked. They pushed it most at that hour. That takes remembering for a day, not three seconds. You'll often read that goldfish remember for months; that may well be true, but the write-ups disagree on which study showed it, so this card doesn't lean on it.
Source: the Plymouth lever study (Gee and colleagues), as summarised in the round's notes. The round only claims the lever result.
What kids usually bring
- "Everyone says so." A popular saying. In the round, Kea says it too, and later admits not knowing who said it first.
- "Goldfish have tiny brains." A sensible guess. The lever fish had tiny brains and still learned the hour.
- "My goldfish acts like it's never been fed." The best one: a fish that rushes up at feeding time is remembering that you mean food. The round asks your child: does it rush up when YOU come?
- "My fish comes to the glass when I come in." That's the Duck's reason too, an observation, and a strong one.
At dinner
Ask: "What do you remember from three seconds ago? From yesterday?"
Then the one rule: say their reason back before you give yours.
The round never tells your child the answer. This card does, so you're never caught out. If your child wants to argue with it, that is the point.
