participate in cognitive neuroscience experiments for extra credit!
Post on 19-Dec-2015
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TRANSCRIPT
Mental Representations
• Here’s one possible way to represent information in a brain…
• A “labeled line”:
A “labeled line”-Activity on this unit “means” that a line is present-This one encodes bars or lines
Mental Representations
• Mental representations can start with sensory input and progress to more abstract forms
– texture defined boundaries are representations arrived at by synthesizing the local texture features
Mental Representations
• Mental Representations can interfere
– Stroop task: name the colour in which the word is printed (I.e. don’t read the word, just say the colour
Mental Representations
• Mental Representations can interfere
– Stroop task: name the colour in which the word is printed (I.e. don’t read the word, just say the colour
RED
Mental Representations
• Mental Representations can interfere
– Stroop task: name the colour in which the word is printed (I.e. don’t read the word, just say the colour
BLUE
Mental Representations
• Mental Representations can interfere
– Stroop task: name the colour in which the word is printed (I.e. don’t read the word, just say the colour
GREEN
Mental Representations
• Mental Representations can interfere
– Stroop task: name the colour in which the word is printed (I.e. don’t read the word, just say the colour
RED
Mental Representations
• Mental Representations can interfere
– Stroop task: name the colour in which the word is printed (I.e. don’t read the word, just say the colour
BLUE
Mental Representations
• Mental Representations can interfere
– Stroop task: name the colour in which the word is printed (I.e. don’t read the word, just say the colour
GREEN
Mental Representations
• Mental Representations can interfere
– Stroop task: name the colour in which the word is printed (I.e. don’t read the word, just say the colour
– The mental representation of the colour and the representation of the text are incongruent and interfere
– one representation must be selected and the other suppressed
– This is one conceptualization of attention
Mental Representations
• Representations in neural a neural code aren’t limited to sensory information
• Place cells in hippocampus represent location of an animal in a local coordinate system– Spike rate on a place cell is high when the animal is near one spot but trails off
when the animal moves away
Moser et al. 2008
Mental Representations
• Representations in neural a neural code aren’t limited to sensory information
• Motor Neurons represent intended direction of limb movement– Spike rate increases when monkey is going to make a movement in a particular direction and trails off if the
monkey is going to make a very different movement