Now to take control of your mind takes some work and practice. Here is a list of suggestions on how to do so, not in any order of precedence:
- Analyze the question: You should analyze any question that is posed to you. What are they saying? Are there any hidden parts to the question that you don’t know about? Is this a trick question, could they be looking to see how I answer the question rather than what I am saying? Are there any hidden parts to this question that I should know about?
- Strategize a response: As in any good speech or presentation there should be an opening, body and closing. Your response should contain those elements. Interview questions are designed to test your knowledge on particular subjects as well as to test your ability to think and act under pressure. In strategizing your response you need to act upon the data you collected in #1 when you analyzed the question. Your response should be organized and coherent, not rambling and should be delivered in a manner that makes you look good.
- Mind control: I couldn’t think of another title here but the gist is connecting mind and mouth. North Americans are reported to speak at around 125 to 150 words per minute. If we speak faster, as we would if we are trying to speak more enthusiastically we would likely reach 200-225 words per minute. The problem is that we would likely lose our audience. They wouldn’t be able to process some of our ideas before you move on the next item. Our mind, on the other hand, can speak from 1000 words to 2000 words per minute. They say a picture is worth a thousand words and at many times we have pictures flash through our minds. So perhaps we actually speak in our minds at many thousands of words per minute. The skill development needed is to put a throttle on the speed limit of the mind and the capability of the tongue to get your message across.
- Practice makes perfect: Actually it doesn’t! To become a better communicator and in turn a better job candidate, it takes practice. If you keep practicing the same thing over and over again you are likely repeating the same mistakes and getting better at making the mistakes. The secret is practice with constructive feedback. You can get this by joining a local Toastmasters club. Almost every role that you take on in a club meeting is provided constructive feedback from a fellow member.
- Practice thinking and speaking: Impromptu speaking can be a great way to build your mind and tongue connection. Have somebody pose different questions to you and you in turn provide a response. Have the other person provide you with feedback as to how they think you answered the question and perhaps provide something that you may have added.
- Predict and Practice: When you are going to interview for a job, you can predict that certain questions will be asked. Write a list of all the possible questions that you think might be asked and prepare responses for them. A quick Google search will likely give you lots of questions. Being prepared will help control your nervousness and in turn slow down your delivery.
- Research speech delivery: Here are some urls for questions that I have already answered here on Quora that relate to speaking that should be of help to you:
One final comment. You say “It's really affecting my interviews as people think I'm slow and dunce.” You can’t control how other people think about you. Unless they have actually said that out loud to you, it is only your mind putting you down. Sig Sigler calls it “stinkin thinkin!” Being successful in any endeavour and certainly when interviewing for a job, requires going in with a positive attitude. Doing some personal skill development as described in this answer will not only help you with your job interviews but will likely open up opportunities in life for you.
It works. I’ve done it and I have seen many others be successful in life when they have learned some new skills.
Thanks for the question and good luck in your future job interviewing.