An action taken by an individual or group of their own free will, often in reaction to a situation or stimulus.

स्वैच्छिक प्रतिक्रिया

English Usage: The study focused on the voluntary response of participants when asked to give feedback.

Hindi Usage: अध्ययन ने प्रतिभागियों की स्वैच्छिक प्रतिक्रिया पर ध्यान केंद्रित किया जब उनसे फीडबैक देने के लिए कहा गया।