Introduction:
The psychology optional syllabus for UPSC is vast and covers a wide range of topics. To effectively revise these topics, it is important to have a systematic approach. Here is a detailed explanation of how often you should revise different topics within the psychology optional syllabus.

1. Prioritize Topics:
Before deciding on the frequency of revision, it is essential to prioritize the topics based on their weightage in the syllabus and their relevance in previous year question papers. This will help you allocate more time to important topics.

2. Initial Thorough Reading:
Start by thoroughly reading and understanding each topic in the syllabus. This initial reading will help you gain a basic understanding of the concepts and theories.

3. Regular Revision:
Once you have completed the initial reading, create a revision schedule that includes regular revision sessions. Regular revision is crucial to reinforce the learned material and improve retention. Here are some suggestions for the frequency of revision:

- Weekly Revision: Allocate one or two days every week for revision. During these sessions, revise the topics you have studied in the previous week. This will help you consolidate the information and identify any gaps in your understanding.

- Monthly Revision: Allocate a few days every month for comprehensive revision. During these sessions, revise all the topics covered in the past month. This will help you maintain a holistic understanding of the subject and ensure that you don't forget important concepts.

4. Intensive Revision:
Apart from regular revision, it is important to allocate time for intensive revision before the exam. This includes revising the entire syllabus in a structured and focused manner. Here are some suggestions:

- Pre-Exam Revision: Allocate at least 2-3 weeks before the exam for intensive revision. During this time, revise all the topics in the syllabus, paying extra attention to the areas where you feel less confident.

- Mock Tests: Take regular mock tests to assess your knowledge and identify areas that require further revision. Allocate time to revise these specific topics before the exam.

Conclusion:
In conclusion, the frequency of revision for different topics within the psychology optional syllabus should include regular weekly and monthly revisions, along with intensive revision before the exam. Prioritizing topics, maintaining a revision schedule, and identifying areas of weakness are key strategies to effectively revise the syllabus and perform well in the UPSC examination.