Optional Subject in UPSC CSE: Importance and Scoring Potential
Why Does the Optional Subject Matter So Much?
- The Optional Subject is the only paper category that candidates are allowed to choose in the Civil Services Examination (CSE), and its marks are included in the final merit calculation. All other papers are either common to all candidates or qualifying in nature.
- The Optional Subject can play a decisive role in UPSC CSE success. While it may be difficult to create a substantial advantage in the General Studies (GS) Mains papers, a well-chosen optional, combined with focused and effective preparation, can provide a lead of 20–50 marks.
Optional vs GS: Where Is the Greater Scoring Opportunity?
Selecting an appropriate optional is particularly important because the scope for securing higher marks is greater in the Optional Subject than in the GS Mains examination or other paper categories.
- Although the GS Mains examination carries 1000 marks, the average scores of GS Mains toppers over a period of two to three years generally fall between 475 and 525 marks out of 1000. This amounts to only around 50% of the total GS Mains marks.
- In comparison, toppers in various Optional Subjects generally score between 350 and 370 marks out of 500, which is more than 70% of the total marks.
- Therefore, despite having a lower overall weightage than GS Mains, the Optional Subject offers a significantly better possibility of achieving a higher percentage of marks.
How Much Does the Choice of Optional Affect Your Score?
The scoring potential of individual Optional Subjects can create a substantial difference in candidates’ overall marks.
- When two candidates choose the same Optional Subject, they are more likely to obtain marks within a similar range, provided their level of preparation is comparable.
- However, when two candidates select different Optional Subjects, the variation in their marks can be considerably greater, even when both have undertaken preparation at a similar level.
The Cost of Choosing the Wrong Optional
An inappropriate choice of Optional Subject can become a major factor behind failure to clear the UPSC CSE Mains examination.
- Among two serious candidates, the difference in their GS Mains scores is generally unlikely to exceed 10–15 marks.
- In contrast, the difference arising from their Optional Subject scores can commonly reach 40–60 marks.
Thus, the choice of Optional can have a much greater impact on the final score than differences in GS Mains performance.
Why UPSC Uses Moderation Rather Than Scaling?
Unlike State Public Service Commission (PSC) examinations, UPSC does not use scaling for Optional Subjects. Instead, it follows the system of moderation.
Scaling vs Moderation
Scaling attempts to make the marks obtained in two or more different Optional Subjects comparable. It is based on the assumption that students performing at the top level in different subjects are broadly comparable in terms of their academic level.
For example, scaling would assume that the highest-scoring candidate in Mathematics Optional is at a similar level as the candidate securing the highest marks in Anthropology Optional, and would accordingly equate their scores.
UPSC does not consider this assumption to be valid and therefore follows moderation instead.
Under moderation, if an examiner in a particular subject awards a candidate additional marks, the Chief Examiner may reduce or moderate those marks based on his or her own assessment and understanding of the subject.
Thus, moderation seeks to regulate variations in evaluation rather than directly equating scores across different Optional Subjects.
