##  [Fisher Information Matrix](/fisher-information-matrix) 

  ##  [Fisher Information Matrix](https://natural.quantumdictionary.io/fisher-information-matrix-0) 

  

 [![Natural & Formal Sciences Dictionary](/sites/default/files/styles/large/public/2026-01/Natural%20%26%20Formal%20Sciences.png.webp?itok=2kCDRVQv)](/topic-specific-dictionaries/natural-formal-sciences)



**Natural & Formal Sciences Dictionary**

 







 

 

 

 



 

 

 

 

Definition

A symmetric positive semidefinite matrix whose (i,j) element equals the expected value of the product of score components or the negative expected second derivative of the log-likelihood with respect to parameters; it quantifies parameter sensitivity of a parametric model.