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Lecture 4

PSY270H1 Lecture Notes - Lecture 4: Temporal Lobe, Anterograde Amnesia, Retrograde Amnesia

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Gillian Rowe

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Lecture 4
audio 37
definition, theories (what was proposed, what are the evidence for and what are the
problems about it?), outcome and evidence; experiement, matching
Key Themes
1. Structure vs. Function
2. Serial vs. Parallel Processing
3. Modular vs. Domain general Processing
4. Connection between memory and attention
hard to draw a line between where attention ends and where memory begins
Feature Integration Theory
visual search lab: attention comes in only in some searches
Single feature does not require attention and “pops out” automatically – this is
the preattentive stage --> feature search ends at preattentive stage
analyze all the features that are present --> all independently --> blue,
green, circle, square --> no attention to which green ones are circle and etc.
--> find out which ones are green automatically --> fast and parallel
one feature = no attention
visual system is analyzing the bits --> not focusing
Binding features requires attention – this is the focused attention stage -->
combines all the independent features together
role of attention in visual search is to bind features at one location
conjunctive search --> binds shape and color together --> need to recruit
attention --> attention can only work at one place at a time--> green circle -->
serial --> more distractors = slower
never becomes automatic --> with practice, might become faster, but
attention is always needed to go from location to location

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What do we want to know about memory?
Memory researchers are concerned with the type of things our memory can
how is it organized?
what is the structure of the memory
how is memory coded --> what form we use to hold memory
Memory researchers are concerned with the limiting factors of memory
what things limit memory
capacity (how much) and duration (how long)
Memory researchers are concerned with the processes that allow information to
enter and exit memory
how do we put things in memory, hold in memory and extract things out
Evidence for the distinction between explicit and implicit memory systems
comes from people suffering from amnesia
declarative: we can talk about it -- we have the knowledge of having it -->
conscious of
non-declarative: don’t know that we have the knowledge; the memory you
have but can’t talk about it --> not conscious

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Retrograde amnesia:
Memory loss for events prior to brain trauma
lose memory before that
most remote memory stays in tact (least likely to lose) --> old memory
remembered best
gradient structure
improve with time --> memory comes back: oldest first --> closer and
closer to the present
Anterograde amnesia:
Memory loss for events after trauma
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