Extracting action knowledge in security informatics

2012 ◽  
Author(s):  
Ansheng Ge ◽  
Wenji Mao ◽  
Daniel Zeng ◽  
Qingchao Kong ◽  
Huachi Zhu
Keyword(s):  
Action Knowledge ◽  
Security Informatics

scholarly journals People accurately predict the transition probabilities between actions

2021 ◽  
Vol 7 (9) ◽  
pp. eabd4995
Author(s):  
Mark A. Thornton ◽  
Diana I. Tamir
Keyword(s):  
Mental Models ◽  
Social Life ◽  
Conceptual Knowledge ◽  
Transition Probabilities ◽  
Accurate Knowledge ◽  
Action Knowledge

Social life is a complex dance. To coordinate gracefully with one’s partners, one must predict their actions. Here, we investigated how people predict others’ actions. We hypothesized that people can accurately predict others’ future actions based on knowledge of their current actions, coupled with knowledge of action transitions. To test whether people have accurate knowledge of the transition probabilities between actions, we compared actual rates of action transitions—calculated from four large naturalistic datasets—to participants’ ratings of the transition probabilities between corresponding sets of actions. In five preregistered studies, participants demonstrated accurate mental models of action transitions. Furthermore, we found that people drew upon conceptual knowledge of actions—described by the six-dimensional ACT-FASTaxonomy—to guide their accurate predictions. Together, these results indicate that people can accurately anticipate other people’s moves in the dance of social life and that the structure of action knowledge may be tailored to making these predictions.

scholarly journals Impaired action knowledge in amyotrophic lateral sclerosis

Neurology ◽  
2008 ◽  
Vol 71 (18) ◽  
pp. 1396-1401 ◽  
Author(s):  
M. Grossman ◽  
C. Anderson ◽  
A. Khan ◽  
B. Avants ◽  
L. Elman ◽  
...  
Keyword(s):  
Amyotrophic Lateral Sclerosis ◽  
Action Knowledge ◽  
Lateral Sclerosis

Conceptual apraxia and semantic memory deficit in Alzheimer's disease: Two sides of the same coin?

2000 ◽  
Vol 6 (6) ◽  
pp. 693-703 ◽  
Author(s):  
CATHERINE DUMONT ◽  
BERNADETTE SKA ◽  
YVES JOANETTE
Keyword(s):  
Alzheimer’S Disease ◽  
Alzheimer's Disease ◽  
Cognitive Model ◽  
Semantic Knowledge ◽  
Matching Task ◽  
Semantic Matching ◽  
Language Deficit ◽  
Sequential Organization ◽  
Action Knowledge ◽  
Actual Use

This study was designed to examine the patterns of apraxic disturbances and the relationships between action knowledge and other measures of semantic knowledge about objects in 10 well-characterized Alzheimer's disease (AD) patients. Five tasks were used to assess components of action knowledge (action–tool relationships, pantomime recognition, and sequential organization of action) and praxis execution (actual use, pantomiming) according to the cognitive model of praxis. Three tasks (verbal comprehension, naming, and a visual semantic matching task) were used to assess verbal–visual semantics. Considering patterns of apraxia first, conceptual apraxia was found in 9 out of the 10 AD patients, suggesting that it is a common feature even in the early stages of AD. Second, we found partly parallel deficits in tests of action-semantic and verbal–visual semantic knowledge in 9 AD patients. Impaired action knowledge was found only in patients with a semantic language deficit. These findings provide no evidence that “action semantics” may be separated from other semantic information. Our results support the view of a unitary semantic system, given that the representations of action-semantic and other semantic knowledge of objects are often simultaneously disrupted in AD. (JINS, 2000, 6, 693–703.)

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