BMS248 Lecture 14 - Linking senses and behaviour to memory Flashcards
1
Q
What is the drift diffusion model of evidence accumulation a model of?
A
The cognitive processes involved in simple two-choice decisions - binary choice task
2
Q
What does the model explain? (2)
A
- The frequency distribution of reaction times
- Speed-accuracy trade-off
3
Q
What 2 things is the drift diffusion model a measure of?
A
- Choice - accuracy of decision
- Reaction time - how long does it take you to make the decision?
4
Q
What has to be reached before a response is initiated?
A
One of 2 decision bounds - these define the stopping point.
Yes or No
5
Q
The distribution of reaction times is skewed in what direction?
A
Right (non-Gaussian)
6
Q
How is Gaussian distribution recovered?
A
Scale the x-axis according to the reciprocal of reaction time - 1/RT
7
Q
What does the drift diffusion model explain in terms of decision time and the accuracy of those decisions?
A
Forced early decisions are less accurate - trade-off between speed and accuracy
