1-18-11 - 1/18/11 Introduction and History of Cognitive...

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1/18/11 Introduction and History of Cognitive Psychology Early Precursors to Cognitive Psychology Plato and Aristotle (4 th and 5 th century BC) o Memory as a wax tablet Individual difference in size Consistency of wax during development Hard consistency it was harder for it to stick and read whereas a soft consistency would be easier for it to stick and read The First Cognitive Pscyhologists Hemholtz (1850) o Can measure speed of electrical impulse o Attached wires to frog’s leg muscle Muscle contracted- broke a circuit o Sent impulse- measured time between applying electrical stimulation and muscle contraction o A similar experiment was done with humans—took longer for humans to feel shock sent to toe than the one sent to spine—because the shock has to travel further to the toe than the spine. o Measured the time of neural transmission Donders (1868) o Mental chronometry Measuring how long a cognitive process takes Press a button when you see the light & he measured the time it took to press a button, then he said there will be a light in one of 2 places—if its on the left press with your left hand if its on the right press with your right hand and then he measured the time it took to press the button Choice RT-Simple RT = Decision Time Choice RT = 1/10 th sec longer than simple RT Therefore 1/10 th sec to make decision Mental responses cannot be measured directly but can be inferred from the participants behavior Ebbinghaus (1885) o Read list of nonsense syllables aloud many times DAZ, LUH, ZIF, etc
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o Tried to memorize them in order
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This note was uploaded on 02/14/2011 for the course PSYC 4100 taught by Professor Unsworth during the Spring '09 term at University of Georgia Athens.

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1-18-11 - 1/18/11 Introduction and History of Cognitive...

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