PSYA01H3 Lecture Notes - Absolute Threshold, Ganglion Cell, Cornea
21 Nov 2012
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Slide 1 = earnst weber just noticeable differences. Presented you can detect the difference two stimuli and discovered it is a constant fraction. (difference threshold) Absolute threshold- the line where you are aware of something versus where you are not. When there are payoffs eg 1$ for every given hit no penalty for false alarm, you will always hit. Opposite, (-1$ for every false alarm) you will never say hit. Generally, when you have no information your hit rate = your false alarm rate. The picture of niagara falls could be just a bunch of pixels. The transduction of seeing it to the picture being highly categorized happens so fast (turns into perception so fast) we can"t appreciate sensation. Our memories are already affecting how we see the picture. Slide 3- what humans have with sight, other animals have with other senses. Eg- dogs can smell bats have echo location, snakes can sense low frequency, sharks can feel electric.
