A comprehensive decoding of cognitive load (Zhu & Korivand)

Question 1

What is cognitive load (general definition)

Answer 1

• Cognitive load is the total amount of resources or mental effort used by our working memory.
• Cognitive load is the amount of cognitive work expended during working memory relates tasks

Question 2

What is working memory?

Answer 2

Working memory is a subset of our short-term memory that involves the temporary storage, processing, manipulating, ad association of information. (Ex: Recalling the route you took to reach a certain store in the mall, or recalling a phone number someone just told you).

Question 3

What does Eye Movement as a Readout of Cognitive Processes mean?

Answer 3

It means that eye movement represents a visual display of cognitive load changes.

Question 4

What is the problem/motivation?

Answer 4

To examine the neurophysiological expression difference and mechanisms under various cognitive loads.
- to establish a link between nuerophysiological activation and cognitive load at different levels.

Question 5

What are temporal changes?

Answer 5

• Temporal changes are the ongoing alterations that occur in cognitive functions and behaviors over the course of a neurodegerative disease.

Question 6

How was data collected?

Answer 6

Participants performed arithmetic tasks, and the various difficulties of the problems were expected to induce corresponding cognitive load levels. Physiological data was simultaneously collected during the experiment using a EEG device and a Eye tracking device.

Question 7

What is Source Locaization?

Answer 7

Source Localization is a technique used in neuroimaging to identify the specific regions of the brain where neural activity originates. This is especially useful in understanding how different cognitive loads affect various parts of the brain.

Question 8

DL Model for Eye Movement and Cognitive Load

Answer 8

• since eye movement is a readout of cognitive load, the used a deep learning model to learn the association between EEG features, EDA features, and pupil diameter variation, demonstrating that EDA, EEG, and pupil diameter are jointly related to cognitive load.

Question 9

sLORETA method for source localization

Answer 9

• sLORETA (standardized low-resolution brain electromagnetic tomography) is a neuroimaging technique that estimates brain electrical activity by mapping electrical current density across multiple brain regions,

Question 10

cognitive load classification

Answer 10

They used 6 different classical ML models to compare the performances of different techniques as well as to compare the accuracy of unimodal modals vs the multimodal modal.