Here's something that fits into a 2x2:
| | Pull | Push | | ---- | ---- | ---- | | Internal | Doing something because you like it. | Doing something because you feel guilty otherwise. | | External | Doing something because you'll get rewards. | Doing something because you'll get punished otherwise. |
Not sure how correct this is. I was musing about my own sources of motivation earlier, and I realzied that even internal motivation can be push/pull.