week 4- predictive processing

extra mission

vision is like touch where your eyes emit a force which reacts he’s out to touch an external object

intromission

vision isn’t external but bounces off objects and goes into the eyes and brain, creating internal representations

concept of intromission

information flows mainly in one direction from the senses to the Brian, where it is represented

criticism of intromission

the brain cannot directly access the causes of sensory information- it only receives the effect of those causes

predictive processing

the brain actively generates predictions about what it expects to recevie

differences between predictions and sensory input are called prediction errors and these are then updated

the predictive processing cycle

• prior expectations- the brain predicts

• incoming sensory information- information arrives from the senses

• prediction error- brain identifies between what is predictive and what is recevied

• model updating- the brain adjusts its interpretation and generates new predictions

bayesian inference

uses prior probability and sensory evidence to create posterior probability

prediction errors in n400

the brain uses context to predict what comes next

when something doesn’t match, prediction error increases

400ms on EEG signal is associated with unexpected processingand dip in signal

feedback connections

the brain has more feedback than feedforward connections- perception involves top-down processing

neurophenomenological hypothesis

our conscious experience is our internal model so we never experience the world as it truly is

phenomenal self model

we represent ourselves as an active agent within our stimulation

aberrant predictions

predictions aren’t set and equal and vary depending on the context

this creates biases when we rely more on incoming information

ASD and…

relying on sensory information to much which makes it hard to update our mental model

the effect of overweighing senses

• routine helps us to create a predictable world when living with autism and this increases predictability

• hard to identify faint patterns

hallucinations

false perceptions such as patients hearing people talking about them is increased when inhibition is mitigated

delusions

irrational beleifs increase when there are repeated prediction errors

reification

 

-       Treating thoughts, feelings, or perceptions as if they were objective realities

de-reification

-       Treating thoughts, feelings, or perceptions as as fleeting phenomena, not ultimate truths.

meditation

helps us to notice sensations and feelings without allowing them to reshape our perception