Okay kiddo, let's talk about psychological nominalism! It's a big phrase, but don't worry, we'll break it down.
Psychology is the study of how people think and feel. Nominalism is the idea that words and names are just labels we give to things - they don't actually describe the thing itself.
So, when we put these two things together, psychological nominalism means that the way we think about things is based on the labels we give them. For example, when we call something 'good' or 'bad', we're not describing the thing itself - we're just giving it a label based on our own feelings or opinions.
This idea can be a bit hard to understand at first, but think about it like this: imagine you have a toy car. Some people might think it's a really cool car, and some might not like it so much. The car itself doesn't change, but the way people think about it does. That's psychological nominalism in action!
So, in short, psychological nominalism is the idea that our perceptions and understanding of things are based on the labels we give them, rather than an objective description of the thing itself.