Construct validity

Construct validity is like building with blocks. Imagine you have a bunch of blocks and you want to make a castle. To make sure your castle is a good castle, you have to make sure you use the right blocks in the right way.

In science, it's kind of the same thing. When scientists are trying to make a test or a survey or something like that, they have to make sure they are using the right questions in the right way so that they can actually tell if the thing they want to study is what they think it is.

It's like if you want to build a tower with blocks, but you use some blocks that are too weak, your tower might fall over. Or if you use too many blocks of the wrong color, it might not look like a tower anymore.

So when scientists are making tests or surveys, they have to think really carefully about what they want to study and what kind of questions will help them study it. They also have to make sure they are using the right words and the right kinds of questions so that their results will be accurate and they can learn what they want to learn. That's what construct validity means - making sure you are using the right blocks to build what you want to build in science.