एक सामाजिक मनोवैज्ञानिक पाता है कि जो प्रतिभागी हास्य अभिनेता का वीडियो देखने से पहले कैफीन युक्त कॉफी पीते हैं, वे कॉफी न पीने वाले प्रतिभागियों की तुलना में उसे अधिक मज़ाकिया मानते हैं। ये परिणाम भावना के किस सिद्धांत का सबसे अच्छा समर्थन करते हैं?

Who conducted the mid-20th-century cross-cultural research that identified specific basic facial expressions of emotion as universally recognized?

Given below are two statements, one labeled as Assertion (A) and the other as Reason (R): Assertion (A): Increased creativity and productivity lead to the enhancement of personal psychological resources over time. Reason (R): According to Fredrickson's Broaden-and-Build theory, positive emotions broaden momentary thought-action repertoires. In light of the above statements, choose the correct answer: