Good afternoon, I have a question.

A relative of mine is studying psychology, and I'd like to know what psychological tests measure. I'm referring to putting together colored cubes, listening to and repeating numbers in different orders (in reverse, from largest to smallest, from smallest to largest). I couldn't help but be curious about these types of questions, and when I asked my relative what they're for, he ignored me, so I'd appreciate it if you could enlighten me.