Clearly, there isn't just one way to measure things like memory, happiness,
guilt, love, and these are called constructs. It's very difficult sometimes to
define and measure them, and so there are a lot of different ways that we can do
that. BBC came up with one way of measuring memory by creating a test on how
well you can remember faces. Click the link at the right, called BBC Face Memory
Test, to do this memory test. Remember, your scores and write them down. And
again, this isn't graded. We're just going to do this because this is a formal
way of measuring and testing memory.