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Lecture 8

Lecture 8 - Form Perception.docx

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Christopher Teeter

Lecture 8 - Faces • Hillside of macho pichu looks like a face from one angle but not another • When you see a stimulus that looks like a face, the fusiform face area is active (area for processing faces) – little delayed than if you look at a real face • Capgras Delusion – see a face but don’t recognize it because you don’t have the emotional connection • Pareidolia – meaning/emotion in faces that we see in objects – all the parts of a face are there so we see a face but it is not really a face o May have affected evolution of organisms o Ex. Heikegani crabs – Japanese warrior spirits inside – fishermen put those back in the water – selects for that trait o Face of mars – image of mars that looks like a face – up close, it is a mountain range 7x the size of McMaster campus o People like to have big explanations for big events  Ex. subjects presented with a story about an assignation – if victim dies, people are more likely to attribute it to a big conspiracy theory/if they don’t dies, they attribute it to just him being attacked • Experience influences face processing – top-down processing (prior experiences influence what your see) • What makes faces important? – attractiveness is related to health, intelligence, etc. ( not always true but it is assumed) o Get emotion out of facial expressions • When you average faces, people rate it as more attractive than each of the individual ones – referred to as the averageness affect o You have an average idea of attractiveness in your mind and since the average image is more like the one you have in your mind so easier processing is attributed to more attractive o In one study they averaged 60 faces, then took the top 15 and averaged them, then made a hyper attractive face – the first is most average but the last was rated as most attractive • We can tell people’s emotions by their facial expressions o When you are lying, 90% show a combination of fear and disgust (vs. 30% of people telling the truth) o Each expression is a combination of many micro-expressions Face Proce
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