One doing a task because they find it enjoyable and satisfying.

Example: A student wants to read a book because they enjoy doing so.

One doing a task to just to receive a reward after.

Example: A student reads a book because they will receive a prize/award.

One lacking any source of motivation in doing a task.

Example: A student doesn't read a book because they see no purpose of doing so.

One does a task because of external demand or possible reward

Example: A student will read more books, if they identify that they will receive more/bigger rewards.

One doing a task in order to maintain self-esteem/pride or to avoid guilty/anxiety

Example: A student will read a lot of books, so they will be able to boast and keep their image high.

One identifies that the task is significant.

Example: A student doesn't necessarily want to read, but realizes that it's important.