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Can our memory be biased? As it turns out – yes it can. Stored memories can be strengthened, weakened or even changed unconsciously by the brain. In what way?

There are many types of biases that effect memory. For example cross-race effect – when representatives of other race seem to be undistinguishable. Another example is choice-supportive bias, when we remember chosen option better than rejected ones. Or the list effect when we can recall more elements of long list than from a short one. There’s even a “google effect” when we forget information, that can be easily found on the Internet.

What does this mean for us? Well, sometimes it is sufficient to “program” ourselves to memorize something better and it actually happens. That is one of the easiest way to improve memory – isn’t it?

But what if our memories change? Then what remains is to use more objective sources. Like pictures, or ask your family and friends. Real information should repeat itself in different sources. This is even used by police during interrogation.