This is something I noticed when teaching my dad to use a computer; when I said "right" click, he always press the button with his index finger and will continue to do so until I tell him he have to press using the middle finger.
So my guess is, it has something to do with the fact that people are used to using their index finger to press something. Multiple buttons on digital camera are pressed using the index finger. Buttons on a TV remote are pressed using the index finger. Right click? Press the button? The intuition kicks in, and the index finger is used.
The "right click" that involves alternate pressing apart from what they are used to do so daily might be unfamiliar concept to those people. A vague, unfamiliar concept that is not intuitive to them are more likely to be forgotten. However, a set of rules for a specific task might be easier to remember even though it is unintuitive. A radio dashboard, for example.
So my guess is, it has something to do with the fact that people are used to using their index finger to press something. Multiple buttons on digital camera are pressed using the index finger. Buttons on a TV remote are pressed using the index finger. Right click? Press the button? The intuition kicks in, and the index finger is used.
The "right click" that involves alternate pressing apart from what they are used to do so daily might be unfamiliar concept to those people. A vague, unfamiliar concept that is not intuitive to them are more likely to be forgotten. However, a set of rules for a specific task might be easier to remember even though it is unintuitive. A radio dashboard, for example.