I came across an intersting medical quiz site called bigneedle.com and saw a very interesting way of marking the quiz. I am sharing it here so that somewhere at the back of our minds, this method should exist, too in case it can possibly be developed for moodle's enhancement.
What it really does is, the moment a question is presentd to you, it has 10 marks shown on a scale on the right. As you take time to mull over the questions, these marks go on reducing. I had prepared a video for you all but it bacame of 10 mb so see these screenshots and if you are interested, see http://bigneedle.com/trybolus.php
NOTE: THE POINTS FOR THE QUESTION ARE ON RIGHT SIDE VERTICALLY AND WATCH THEM GO DOWN AS I TOOK TIME TO THINK ABOUT THE ANSWER.