|
| | | | |
| | | |
| Stat |
Members: 3645
Articles: 2'504'928
Articles rated: 2609
25 April 2024 |
|
| | | | |
|
Article overview
| |
|
|
Modeling Task Effects on Meaning Representation in the Brain via Zero-Shot MEG Prediction | | Mariya Toneva
; Otilia Stretcu
; Barnabas Poczos
; Leila Wehbe
; Tom M. Mitchell
; | | Date: |
17 Sep 2020 | | Abstract: | How meaning is represented in the brain is still one of the big open
questions in neuroscience. Does a word (e.g., bird) always have the same
representation, or does the task under which the word is processed alter its
representation (answering "can you eat it?" versus "can it fly?")? The brain
activity of subjects who read the same word while performing different semantic
tasks has been shown to differ across tasks. However, it is still not
understood how the task itself contributes to this difference. In the current
work, we study Magnetoencephalography (MEG) brain recordings of participants
tasked with answering questions about concrete nouns. We investigate the effect
of the task (i.e. the question being asked) on the processing of the concrete
noun by predicting the millisecond-resolution MEG recordings as a function of
both the semantics of the noun and the task. Using this approach, we test
several hypotheses about the task-stimulus interactions by comparing the
zero-shot predictions made by these hypotheses for novel tasks and nouns not
seen during training. We find that incorporating the task semantics
significantly improves the prediction of MEG recordings, across participants.
The improvement occurs 475-550ms after the participants first see the word,
which corresponds to what is considered to be the ending time of semantic
processing for a word. These results suggest that only the end of semantic
processing of a word is task-dependent, and pose a challenge for future
research to formulate new hypotheses for earlier task effects as a function of
the task and stimuli. | | Source: | arXiv, 2009.08424 | | Services: | Forum | Review | PDF | Favorites | |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
|
| |
|
|
|
|
News, job offers and information for researchers and scientists:
| |
REGISTER