The passage given below is followed by four alternate summaries. Choose the option that best captures the essence of the passage.
McGurk and MacDonald (1976) reported a powerful multisensory illusion occurring with audio-visual speech. They recorded a voice articulating a consonant 'ba-ba-ba' and dubbed it with a face articulating another consonant 'ga-ga-ga'. Even though the acoustic speech signal was well recognized alone, it was heard as another consonant after dubbing with incongruent visual speech i.e., 'da-da-da'. The illusion, termed as the McGurk effect, has been replicated many times, and it has sparked an abundance of research. The reason for the great impact is that this is a striking demonstration of multisensory integration, where that auditory and visual information is merged into a unified, integrated percept.
The passage given below is followed by four alternate summaries. Choose the option that best captures the essence of the passage.
McGurk and MacDonald (1976) reported a powerful multisensory illusion occurring with audio-visual speech. They recorded a voice articulating a consonant 'ba-ba-ba' and dubbed it with a face articulating another consonant 'ga-ga-ga'. Even though the acoustic speech signal was well recognized alone, it was heard as another consonant after dubbing with incongruent visual speech i.e., 'da-da-da'. The illusion, termed as the McGurk effect, has been replicated many times, and it has sparked an abundance of research. The reason for the great impact is that this is a striking demonstration of multisensory integration, where that auditory and visual information is merged into a unified, integrated percept.
Solution
The key to solving this question is understanding what the McGurk effect actually demonstrates. From passage: "They recorded a voice articulating a consonant 'ba-ba-ba' and dubbed it with a face articulating another consonant 'ga-ga-ga'... it was heard as another consonant after dubbing with incongruent visual speech i.e., 'da-da-da'."
The passage shows a clear process: audio 'ba' + visual 'ga' = perceived 'da'. This isn't confusion or poor integration -> it's the brain creating something completely new from two different inputs.
When choosing between options, students often get confused between Options 1 and 4. π΄ Option 1 -> degree-error -> calls integration "imperfect" and "confusing" but the passage shows integration works perfectly to create a clear, unified sound ('da-da-da'). The brain isn't confused - it's doing exactly what it's designed to do.
π Option 2 -> partial-truth -> mentions replication correctly but completely ignores the main finding about what the McGurk effect actually is. It's like describing a movie by only saying "it was popular."
π΄ Option 3 -> context-shift -> talks about "poor quality" audio, but passage clearly states the acoustic signal "was well recognized alone." Also suggests one sense "wins over" another, but the effect creates something entirely different from both inputs.
π’ Option 4 -> captures both the core mechanism (mismatch creates different perception) and correctly identifies this as the McGurk effect. It matches the passage's key finding perfectly.
The elimination process: Look for what actually happens in the experiment -> 'ba' + 'ga' = 'da' (entirely different message). Only Option 4 captures this essence.