The Problem With a Common Engineering Entrance Test

… is correlation and concentration.

Like everything else, a student’s performance in a test can be divided into two – the predictive component (which can be explained based on preparation levels, general intelligence, ability to handle pressure, etc.) and the random component (which includes and is not limited to illness on the day of the exam, reaching the venue late leading to unsettlement, pure luck (or the lack of it) and so on).

Now, when you have a number of exams, what you expect is for a student’s “random component” to even out across these exams. If he outperforms his “predictive component” in one exam, you would expect that he would underperform in another exam. It’s like the “predictive component” of his performance is the expected “value” of his performance.

Thus, when you have a large number of entrance exams, it gives students the opportunity for their random components to even out, and take luck out to some extent from their college admission process. When you collapse all entrance exams into one, however, a student who happens to get a large negative “random component” on that given day is denied a second chance. Thus, the college admissions process will become much more of a crapshoot than it is now.

The other thing about uniform admission standards is why should every college have the same requirements for the students it wants to recruit? Having a common exam forces this upon colleges, unless they are allowed to change their weights allocated to different sections differently. If this doesn’t happen, it’ll only end up bringing all of the country’s education system to a uniform mediocrity.