Lecure 17: Sensation (Chapter 5)
•This chapter focuses on the "input systems"- our sensory organs.
•Humans are basically an entity; we know what's out there through our sensory organs.
•Sensation Vs. Perception: Seeing purple and blue in a picture is sensation, whereas
seeing beautiful fireworks is perception.
•People with schizophrenia have trouble dealing with reality and their fantized world.
They loose the distinction between what happens in the world and what happens in
•When someone speaks in a different language, we only hear the song (sensation) but we
don't understand what it means (perception).
•People who like photograpghy is because it changes what they preceive they see in the
world. They focus more on sensation, once they see the world through colors and shapes,
they begin to see the world like that all the time.
•Transduction: the literal process by which the sense organs convert energy from
environmental events into neural activity.
•If we consider light: energy with certain frequencies, television and radio braodcasts is
the same energy in light. The signals are all around but we don't see them. Our eyes are
limited to what we see.
•Look at 5.1 TABLE*
•How can you get the richness of a coding? inhibitory and inhibitory..
•How can you do distinctions between yellow and orange?
•Youtube: Morse Code* with these simple sounds, you can create letters-words-sentences.
This way people communicated, in case of emergencies.
•When people started using things like Morse code, this is sorta how the brain works.
•1: the brain using anatomical coding. Where the signal start and end up.
•2: Temporal coding
•JND: the difference of intensity that is noticeable
•Weber fractions was the first to discover this!