BISC 121Lg Lecture Notes - Lecture 8: Occipital Lobe, Parietal Lobe, Feature Integration Theory

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7 Feb 2017

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Lecture 8
Practice enables you to do things simultaneously that were initially difficult to do at the
same time
Schneider and Shiffrin divided attention between remembering targets and monitoring
rapidly presented stimuli
o Became automatic after ~600 trials
o Practice makes divided attention possible
o Practice results in automatic processing
o Sometimes focusing on things makes it more difficult
If you ask a pianist to focus on the movements of their individual fingers,
they’re going to mess up
Naturalistic driving experiment gave pre-crash and pre-near crash information on 100
o Inattention to forward roadway is the primary contributing factor to all accidents
and near accidents
o 80% of crashes and 65% of near crashes had inattention within 3 seconds of the
event occurring
o Problems: costly, no control, large amounts of data, recruiting bias, extreme age
groups missing, only one location, etc.
Strayer and Johnston simulated driving task
o Participants on the cell phone missed 2x as many red lights and it took longer for
them to apply the breaks
Inattentional blindness- a stimulus that is not attended to is not perceived even though it
may be in plain sight
o Cartwright-Finch and Lavie- don’t see the square which is a task irrelevant
stimulus when the subjects are attempting to perform a task
Binding- features joining to form what we see
o FIT- Feature integration theory
Object Preattentive stage Focused attention stage Perception
Preattentive stage analyzes the features as “free floating features”
The features are combined in the focused attention stage
Treisman and Schmidt- presented objects very quickly
Participants report combination of features from different objects
making up a single object
Mostly bottom-up processing
Top-down influences when participants are told what they should
have seen
Balint syndrome causes the inability to focus attention on individual objects
o Ran experiments on FIT on a man who had Balint syndrome
o Parietal lobe damage
o High number of illusory correlations reported
o FIT: lack of attention results in difficulty combining features correctly
Need to have good attention skills in order for the focused attention stage
to occur
Attention enhances neural responding
o Distributed across much of the brain
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