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Upcoming Reading Read experiment 1 in the article by Lee Brooks for Thursday March 29th

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Are All Subliminal Messages Intentionally Inserted? These messages tend not to be clear and obvious

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Are All Subliminal Messages Intentionally Inserted? These messages tend not to be clear and obvious Could it be that our brains mistakenly see or hear messages that arent really there?

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Are All Subliminal Messages Intentionally Inserted? These messages tend not to be clear and obvious Could it be that our brains mistakenly see or hear messages that arent really there? Do brains make stuff up!?

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Are All Subliminal Messages Intentionally Inserted? These messages tend not to be clear and obvious Could it be that our brains mistakenly see or hear messages that arent really there? Do brains make stuff up!? Absolutely! All the time.

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Are All Subliminal Messages Intentionally Inserted? Is there really a dog or are the spots enough like a dog for your brain to fill in the rest?

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Are All Subliminal Messages Intentionally Inserted? Some other examples you already know about : Missing fundamental, color constancy, size constancy, the Kaniza triangle, stereo depth, the blindspot, illusory conjunctions

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Subliminal Messages Where you Least Expect Them How did Vokey and Read test the idea that subliminal messages might just be a case of mistaken perception?

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Subliminal Messages Where you Least Expect Them They examined passages from various sources (Jabberwokey and the 23rd Psalm) played backwards to identify candidate messages

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Subliminal Messages Where you Least Expect Them Listeners were given each passage (backwards) and asked to listen for 12 possible messages Listeners detected messages in the appropriate passage when primed to expect it

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Subliminal Messages Where you Least Expect Them Interpretation: Your brain is remarkably good at active construction of patterns amid a background of noise.

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Subliminal Messages Where you Least Expect Them Interpretation: Your brain is remarkably good at active construction of patterns amid a background of noise. Creative listening by (well-meaning?) public censors can go very wrong

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Subliminal Messages Where you Least Expect Them Consider the trial of Judas Priest Band sued for inserting the message do it which allegedly lead to the suicide of two teens Listen for Do ItThe do its

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Subliminal Messages Where you Least Expect Them Consider the trial of Judas Priest Band sued for inserting the message do it which allegedly lead to the suicide of two teens Band acquitted on the basis of expert testimony

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Expert Testimony !

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Subliminal Messages Where you Least Expect Them With enough creativity and patience one can see subliminal messages just about anywhere:

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Subliminal Messages Where you Least Expect Them Our perceptual mechanisms are great at extracting meaningful images from noisy stimuli. For example - the famous face on Mars: Viking, 1976

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Subliminal Messages Where you Least Expect Them Given a clearer picture it looks a lot less like a face: Mars Global Surveyor, 2001

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The message is Dont be fooled by messages!

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Memory

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Overview of Memory Atkinson-Shiffrin Model Sensory Signals Sensory Memory Short-Term Memory Long-Term Memory ATTENTION REHEARSAL RETRIEVAL

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Sensory Memory Supplementary reading: Cognition (on reserve) Averbach and Sperling (course pack) Part 1

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Capacity Describe a simple experiment that could measure the capacity of memory

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Capacity Describe a simple experiment that could measure the capacity of memory Briefly present some letters or digits and then ask the subject to report them Called whole report

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Capacity +

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F S F E G S A U T O C G +

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Capacity Recall as many letters as you can

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Capacity George Sperling - Systematic investigation of memory capacity Result: subjects accurately recall about 4 items What can you conclude from this result? Maybe subjects can only hold about 4 items?