ExtremeLearners


What does the JEE (Advanced) – 2013 Data Mean for You?

Here are some data related to JEE (Advanced) 2013 and some inferences that can be valuable for IIT aspirants. Some facts, like JEE (Advanced) is an easy examination and can be conquered easily with the right strategy, are clearly visible in these data. Common perception, like it is a very difficult examination, is primarily because majority of the students prepare very hard with a wrong strategy and fail to perform as per their potential. How else can you explain the fact that the marks scored by students who appeared in JEE (Advanced) 2013 varied between 332 and -70 out of maximum of 360? Remember that they all are quite brilliant students and have qualified through JEE (Mains). Look at the following data.

— Data:

The highest overall score for JEE 2013 has been 332 out of 360. This is 92.2% and is considered to be quite a slide from last year’s 96%.

Inference:

The questions asked in JEE can be answered within the given time. Students are able to score more than 90% here too.

— Data:

Only 23 students managed over 300 while 326 students scored over 250.

Inference:

70% of 360 (full marks) = 252. Since only 326 students could score above 250, a student scoring just 70% gets a rank in the top 326. It is so easy.

— Data:

The lowest mark scored this year is minus 70.

Inference:

If you are serious about JEE, don’t get amazed by the number of students taking the examination. Minus 70 and similar marks have been scored by those students who have qualified for JEE-Advanced on the basis of their performance in JEE – Mains. They are good students. Only wrong strategy can lead to such a disaster. Being you and having a right strategy is more important than anything else.

— Data:

The maximum questions unanswered were from mathematics.

Inference:

Yes, you don’t have to answer all the questions. You can leave quite a good number of questions unanswered. But, what is the fun in preparing so hard and leaving the questions unanswered? So much of time and effort goes wasted. Can we identify in advance, the time and efforts that are likely to go wasted and use them smartly on something more productive? Yes, it can be done.

— Data:

About 30-45% students allotted seats at the older IITs were successful on their second attempt.

Inference:

Majority of the seats are grabbed by students taking the first attempt. But 30-45% is not a discouraging figure for those taking the second attempt. They need to understand the challenges they are likely to face and be prepared for that. Remaining motivated for another year, studying the topics that they have studied so many times in the first attempt with same level of enthusiasm and handling distractions are some of the common challenges.

The data used here has been taken from an article published in Times of India. The article can be read here.

Sunday, October 6th, 2013. Written by admin. No comments.


What gets measured, gets managed.

The sentence in the title is a famous quote by Peter Drucker from his 1954 book titled, “The Practice of Management.” The quote has been repeated so many times since then that it has almost become a cliche.

I have personally experienced the power of measurement on several occasions. For example, simply measuring the number of hours I spend working is often enlightening. The measured number almost always turns out to be less than what I had expected. And once I see a number in front of my eyes, I get an urge to improve it. Thus eventually I start working more.

I have seen similar effects of measurement on other people too. A friend of mine was once unhappy with his performance at work. He felt he didn’t have the required skills to succeed in the profession. After a long discussion trying to diagnose his problem, we came to the conclusion that he should monitor the time he spent working. It turned out, he was working for less than 2 hours per week. It was then clear what the culprit was.

I have seen people who are trying to write books get into a race with themselves over how many words they write per day. I have discussed a similar example of racing with yourself in a previous article.

Bestselling author Tim Ferris, in his book “Four Hour Body”, recounts the story of a man who lost weight merely by being aware of it every day. He started by drawing a huge graph with time on the x-axis and his weight on the y-axis. Then he marked his current weight and the weight he wanted to be at after two years. Next, he joined these two points with a straight line, and drew two parallel lines, one above and one below this straight line. These two parallel lines marked the region he wanted to be in. Every day, he would weigh himself and mark the corresponding point on the graph. Whenever he got a mark close to the line on the top, he would feel motivated to eat less and exercise. That’s how he lost 10 pounds in 2 years.

Measurement serves two purposes:

  1. It makes you motivated. It is in human nature that whenever he is given a score based on something he did, it motivates him to improve his score.
  2. It gives you a clear idea about the reality and helps you make effective future strategies.

Try to exploit this power during your preparation.

Monday, March 11th, 2013. Written by Vinayak Pathak. No comments.


Numbers vs. intuition: How to make sure that you act on your plans

How many times have you planned to do something and then not done that?

Back when I was a school-going kid, I would sit down with my cousin every time I performed poorly in an exam and after a brief session of self-pity, we would decide to start taking school more seriously. One part of taking school more seriously was to prepare a “schedule” for studying. Thus, we would decide that from the next day onward, we were going to wake up at 5 AM every day, study for one hour, go to school, come back and study for another four hours, finish all our homeworks and so on. Preparing the schedule always seemed like a life-changing event. We were always convinced that we had found the solution to everything finally and that there was no stopping us from being the most successful people on earth any more. The only problem was that it never worked. I would be totally convinced that I was going to do it for the rest of my life and that this was the new me, that waking up early and working hard was what defined me now. But the next day I wouldn’t do it. The slightly annoying sound of the alarm clock at 5 AM was all it ever took me to drop entirely a plan that I had only the previous day, promised to follow for the rest of my life.

The ineptness of human intuition at distinguishing true from false is well documented. Cognitive biases, as they are called, are little errors that the human brain tends to make from time to time. Whether they are good or bad for the human being is debatable. But that they exist, is a fact and has been proven in hundreds of psychological experiments. The purpose of this article is not to provide an extensive survey of cognitive biases, because it’s a huge area of research and entire books have been written about them. However, a particular error in the circuitry of the human brain is relevant to us and it manifests itself in the form of what is called the overconfidence effect. On an average, people tend to be more confident about their abilities than is accurate. For example, in a study done in 1981, it was found that 93% of American drivers rated themselves as better than the median. This would never happen if the beliefs of the drivers about themselves were perfectly aligned with reality. In fact, the study demonstrates a huge discrepancy between the true driving skills and the believed driving skills of the drivers. If all drivers had the correct belief about their driving skills, exactly 50% of them would have claimed to be above the median, since that is exactly what the median means!

Most people are more afraid of plane crashes than of road accidents even though road accidents are much more frequent than plane crashes. If you spend one hour driving a car, statistically speaking, you are much more likely to have an accident than if you spend one hour flying in a plane. And yet, most probably you are more scared of planes than of cars. I am too, until I remind myself of this statistical fact. It is still very difficult to maintain calm when the airplane I am sitting in is passing through a nasty turbulence. My body automatically starts releasing stress hormones and my instincts begin screaming at me the instructions to flee. I have to constantly keep reminding myself that I am still less likely to die than if I were driving a car right now. On the other hand, driving a car is much less stressful, because I too, like the 93% of the American drivers in the study above subconsciously believe that I am better than the median and thus when faced with an accident-prone situation, I subconsciously believe that I will have the dexterity and the reflexes to steer my car away from disaster.

In Hollywood as well as in Bollywood, and in fact in any other entertainment industry, the number of people aspiring to become successful in show business exceeds in several orders of magnitude the number of people who really are successful. And yet, any new aspirant who decides to join the race is usually more optimistic than is justified about his own chances to succeed. This is another manifestation of the overconfidence effect.

What does all of this have to do with planning to do things and not doing them? An unrealistic belief in yourself leads to a tendency to make absurdly unrealistic plans. If you have planned to wake up at 5 AM twenty times and failed every single time, your newfound enthusiasm and conviction to wake up at 5 AM tomorrow is completely unjustified unless you have changed something fundamental about the scenario. Your intuition will mislead you and it will be very hard to not fall into the trap of assuming that tomorrow is going to be different. But most probably, eighteen out of the twenty times that you failed, the day before that you were also entirely convinced that the next day was going to be different. Thus no matter how strongly you believe that you will successfully wake up at 5, all past evidence points unanimously to the highly likely event that you won’t.

So what’s the solution? How does one get out of the cycle of planning and then not following it? By being sceptical about what your intuition says.

Until recently, I had the bad habit of starting more projects than I could handle. I would subconsciously assign some commitment to anything that would temporarily excite me. And then failing to do all of them, I would get depressed and feel worthless about myself. It’s not that I never evaluated whether I had enough time and resources to start another project. I always did that before starting a new one and (incorrectly) always came up to the conclusion that yes, of course I did. The problem was that I did all the calculation intuitively, which, owing to the overconfidence effect, led me astray. So one day I decided to sit down with a pen and paper (actually with a computer and a keyboard) and do all the calculations using actual numbers. So I listed down all the projects that I considered ongoing and specified the amount of time that I expected myself to spend on each in a week. When I added up the times I assigned to each project, the number turned out to be an insane 140 hours per week! Dividing by 7, we get 20 hours a day, which was just pathologically absurd. This meant, to fulfill all my expectations, I would need to sleep for only 4 hours per day and not do anything other than work for the rest of it. That day was very enlightening to me. I crossed out most of the projects from the list except for the two most important ones and postponed the crossed ones for some later time of my life. My productivity and self-worth, both increased since then.

Perhaps most people are not infected with such an extreme case of overconfidence effect, but the basic message of the story and of the article is to rely on actual numbers more than on intuition. Thus when trying to judge how likely you are to follow a plan you just chalked out, base your judgement on the evidence hidden in your past behavior, not on how you feel about the plan. Your past behavior says a lot about you. It puts some constraints on the plans you are likely to follow. Think about the goals you want to achieve and come up with a plan that violates only a very few of those constraints. If such a plan doesn’t exist, you need to revise your goals.

What exactly does your past behavior say about you and how exactly should you use it to make plans for the future? Are you making unrealistic goals? Knowing the person you are, how likely are you to achieve your goals? What steps should you take to increase the probability? It all eventually boils down to numbers and the right way to interpret them. A Personal Preparation Plan provides you with analytics for your own preparation. You will not need to collect the data and interpret them on your own. Our experts will do the math and provide you with the optimal strategy for your preparation.

Footnote: The article presents a slightly simplified version of the overconfidence effect. There are situations where an equivalent “underconfidence” effect has been observed to exist as well. However, the area of planning is dominated by overconfidence, so much so that it has been given its own name: The Planning Fallacy. People’s planning skills have been repeatedly found to err on the “over” side of the spectrum. In any case, under and over are both miscalibrations and have their own harmful effects, which can only be nullified with an approach based on numbers.

Monday, February 11th, 2013. Written by admin. No comments.


Number-crunching for IIT-JEE preparation

The recent US presidential elections were a big ego-boost for proponents of applying math to real life. First of all, there was Nate Silver, who almost got christened a “witch” because of the uncanny accuracy with which he predicted the outcome of the elections. A statistician by profession, he used the laws of probability to build complex statistical models that predicted the winning candidate in each of the 50 states with 100% accuracy. This was a marvelous achievement, definitely not achievable by more conventional witches that use only intuition and magical spells.

Then, there was an entire team of “number-crunchers” that managed Obama’s election campaign. Barack Obama himself assigned a lot of credit for his victory to this team. Here’s Obama tearing up while thanking them:

Why would an election campaign use numbers? This article explains. Quoting:

When Jim Messina arrived in Chicago as Obama’s newly minted campaign manager in January of 2011, he imposed a mandate on his recruits: they were to make decisions based on measurable data.

Measurable data. As opposed to mere intuition.

For each battleground state every week, the campaign’s call centers conducted 5,000 to 10,000 so-called short-form interviews that quickly gauged a voter’s preferences, and 1,000 interviews in a long-form version that was more like a traditional poll. To derive individual-level predictions, algorithms trawled for patterns between these opinions and the data points the campaign had assembled for every voter—as many as one thousand variables each, drawn from voter registration records, consumer data warehouses, and past campaign contacts.

This innovation was most valued in the field. There, an almost perfect cycle of microtargeting models directed volunteers to scripted conversations with specific voters at the door or over the phone. Each of those interactions produced data that streamed back into Obama’s servers to refine the models pointing volunteers toward the next door worth a knock.

This is amazing. A central server that runs a statistical model and guides each campaigner’s every single step based on data collected from past records and experiments! Aside from giving goosebumps to every statistician on earth, it also led to Obama’s emphatic victory in the presidential elections!

Using real data to make decisions is perhaps one of the most important things humanity has been realizing in the past few years. Why not do the same for the decisions about your career?

Each person is a complex entity. Should you do engineering or should you dabble into arts? What exams should you take? What subjects should you concentrate on? How much time should you spend solving exercise problems and how much time should you spend reading new text books?

Every thing you have ever done in life, every exam you have taken, every question you have answered and the way you have answered them already contains a lot of data to help you take the right career decisions in your life. Every day you leave new clues about what kind of person you are and about what kind of future is best for you. Why not tap into the data and have your own number-crunching team for your preparation for IIT entrance? This is precisely what you get if you sign up for the personal preparation plan.

Tuesday, January 1st, 2013. Written by Vinayak Pathak. No comments.



Get regular study tips in your inbox for free. Subscribe for our newsletter.