Monday, April 10, 2023

MCQ in Information Retrieval - What affects the Precision of an IR system?

Multiple choices questions in IR, Information Retrieval, Interview questions in IR, What affects the precision of an IR system? What is false positive error in IR evaluation metric? What is precision? Why does the increase in false positive error decreases precision?

Information Retrieval solved MCQ - Precision and false positive error

< Previous                      

Next >

 

1. ______ is affected by the number of false positive errors.

a) Precision

b) Recall

c) Both precision and recall

d) Neither precision nor recall


Answer: (a) Precision

Precision is affected by the number of false positive errors.

 

What is precision?

The proportion of retrieved documents those are relevant. Precision measures the system’s ability to reject any non-relevant documents in the retrieved set. Precision is measured as follows;

Precision = |RET ∩ REL|/ |RET|

where |RET ∩ REL| is the number of retrieved documents that are relevant to the given query. |RET| is the number of retrieved documents for the given query.

 

What is false positive error?

A false positive is an outcome where the model incorrectly predicts the positive class. In Information Retrieval, retrieval of a document that is non-relevant is referred as false positive error.

Precision is about the proportion of retrieved documents that are relevant. If a system retrieves the documents that are not relevant, then it will affect the precision (lower the precision) value.  

 

< Previous                      

Next >


************************
Related posts:

 

Keywords

Increase in false positive error decreases precision of a system

Why precision decreases if false positive error increases

What is false positive error?

If the proportion of non-relevant documents increase in the result of an IR system, how does it affect the system?

Precision is affected by false positive errors


No comments:

Post a Comment

Featured Content

Multiple choice questions in Natural Language Processing Home

MCQ in Natural Language Processing, Quiz questions with answers in NLP, Top interview questions in NLP with answers Multiple Choice Que...

All time most popular contents

data recovery