The “capitalize after colon” question is a bit divisive.
So, it pays to know what the different style manuals have to say about it.
What you learned with the MLA handbook in high school doesn’t necessarily apply to that article for a psychology blog.
Also, the rules are a bit different between American and British English.
We’ve listed all the rules to make it easier for you to know when to capitalize after a colon, depending on where and what you’re writing.