Related Experiment Video
Updated: Jul 31, 2025
10:34
Exploring the Radical Nature of a Carbon Surface by Electron Paramagnetic Resonance and a Calibrated Gas Flow
Published on: April 24, 2014
10.8K
Really radical?
1The Wellcome Centre for Human Neuroimaging, UCL Queen Square Institute of Neurology, London WC1N 3AR, UK. k.friston@ucl.ac.ukhttps://www.fil.ion.ucl.ac.uk/~karl/.
The Behavioral and Brain Sciences
|May 8, 2023
Summary
This commentary explores integrating Conviction Narrative Theory (CNT) with Bayesian decision-making models. It proposes a framework for theoretically modeling and predicting decision-making processes.
Area of Science:
- Neurobiology
- Cognitive Science
- Decision-Making Theory
Background:
- Conviction Narrative Theory (CNT) offers a framework for understanding belief formation and adherence.
- Theoretical neurobiology provides insights into the mechanisms underlying decision-making.
Purpose of the Study:
- To explore the integration of Conviction Narrative Theory (CNT) with Bayesian mechanics.
- To propose a computational framework for modeling decision-making.
Main Methods:
- Conceptual analysis of CNT tenets.
- Exploration of Bayesian inference principles.
- Proposal of a theoretical integration framework.
Main Results:
- CNT principles are potentially compatible with Bayesian frameworks.
- An integrated model could offer predictive power for decision-making.
Conclusions:
- Integrating CNT with Bayesian mechanics could advance computational approaches to decision-making.
- This theoretical integration may enable more robust modeling and prediction of cognitive processes.
Related Concept Videos
01:11Radical Reactivity: Overview
2.1K
Radicals, the highly reactive species, gain stability by undergoing three different reactions. The first reaction involves a radical-radical coupling, in which a radical combines with another radical, forming a spin‐paired molecule. The second reaction is between a radical and a spin‐paired molecule, generating a new radical and a new spin‐paired molecule. The third reaction is radical decomposition in a unimolecular reaction, forming a new radical and a spin‐paired...
2.1K
01:02Radical Reactivity: Electrophilic Radicals
1.9K
Radicals adjacent to electron‐withdrawing groups are called electrophilic radicals. These radicals readily react with nucleophilic alkenes. For example, the malonate radical, in which the radical center is flanked by two electron‐withdrawing groups, reacts readily with butyl vinyl ether, which consists of an electron‐donating oxygen substituent. The reaction between electrophilic malonate radical and nucleophilic vinyl ether is favored because the radical has a...
1.9K
00:51Radical Formation: Elimination
1.8K
Another method of radical formation is the elimination process. It is the opposite of the addition route and is driven by the instability of the radical. For example, as depicted in Figure 1, dibenzoyl peroxide yields a pair of unstable radicals upon homolysis. Given its instability, this radical spontaneously undergoes elimination via a C–C bond cleavage to form a relatively more stable phenyl radical. The mechanism involves cleavage of the bond between the α and β positions...
1.8K
01:10Radical Reactivity: Steric Effects
1.9K
The presence of electron-donating, electron-withdrawing, or conjugating groups adjacent to a radical center, imparts electronic stabilization to the radicals. Examples of such electronically-stabilized radicals are triphenylmethyl, tetramethylpiperidine‐N‐oxide, and 2,2‐diphenyl‐1‐picrylhydrazyl. These radicals are remarkably stable and are known as persistent radicals. Some of the persistent radicals can even be isolated and purified.
Along with electronic...
Along with electronic...
1.9K
00:47Radical Formation: Abstraction
3.5K
The electron of an atom can be abstracted from a compound by a relatively unstable radical to generate a new radical of relatively greater stability. For example, an initiator which forms radicals by homolysis can abstract a suitable species like a hydrogen atom or a halogen atom from a compound to generate a new radical. This ability of radicals to propagate by abstraction is a crucial feature of radical chain reactions.
Even though homolysis produces radicals, it is different from radical...
Even though homolysis produces radicals, it is different from radical...
3.5K
01:03Radical Formation: Overview
2.1K
A bond can be broken either by heterolytic bond cleavage to form ions or homolytic bond cleavage to yield radicals. A fishhook arrow is used to represent the motion of a single electron in homolytic bond cleavage. There are two main sources from which radicals can be formed:
Radicals from spin-paired molecules:
Radicals can be obtained from spin-paired molecules either by homolysis or electron transfer. While two radicals are formed in the former, an electron is added in the...
Radicals from spin-paired molecules:
Radicals can be obtained from spin-paired molecules either by homolysis or electron transfer. While two radicals are formed in the former, an electron is added in the...
2.1K