वॉन रिस्टॉर्फ प्रभाव (अलगाव प्रभाव) तब होता है जब कोई तत्व विशिष्ट रूप से दिखाई देता है और बेहतर याद रहता है क्योंकि इसे प्रस्तुत किया गया है:

A boy learnt an essay. According to Hermann Ebbinghaus's forgetting curve, what percentage of information does he forget after 31 days?

Which of the following characteristics are true with reference to Short-Term Memory (STM)? 1. Limited capacity 2. Brief storage of information 3. Unlimited capacity 4. Typical duration of storage is less than 30 seconds without rehearsal Select the correct option: