Featured Research

from universities, journals, and other organizations

New system increases reliability of opinion polls

Date:
April 27, 2011
Source:
Facultad de Informática de la Universidad Politécnica de Madrid
Summary:
Researchers in Spain have developed a fuzzy neural network that uses a numerical and categorical imputation method to reconstruct incomplete datasets. This network achieves substantially better results than the imputation methods now in use in opinion polling.

Researchers from the Universidad Politécnica de Madrid's Facultad de Informática have developed a fuzzy neural network that uses a numerical and categorical imputation method to reconstruct incomplete datasets. This network achieves substantially better results than the imputation methods now in use in opinion polling.

The research results have been published in the journal Neural Computing & Applications.

Missing data is a widespread problem in most surveys conducted in a host of domains. Inaccuracy in political opinion polling can be mostly put down to how unanswered questions are processed. Imputation is the most commonly used technique for accounting for missing information. Imputation methods calculate and add the missing data to the sample to get a more complete dataset. Imputation methods can infer numerical and categorical data.

90% reliability

The researchers Jesús Cardeñosa, of the Artificial Intelligence Department at the Facultad de Informática, and Pilar Rey del Castillo, of the Institute of Fiscal Studies at the Spanish Ministry of Economics, have modified Gabrys and Bargiela's numerical imputation method to infer categorical data.

With this system, imputation can, for example, determine the voting intention of a person that has not answered all the opinion poll questions with near 90% reliability. This is a substantial improvement on current methods. Other potential applications for this neural network are medical diagnosis or surveying using categorical variables.

The first step of this new imputation method is to define the distances between categories using fuzzy logic. With the support of the neural network that learns from each case, it then determines where each category is located within the different dataset spaces. Finally, it extends the network architecture to all the data and processes the missing data.


Story Source:

The above story is based on materials provided by Facultad de Informática de la Universidad Politécnica de Madrid. Note: Materials may be edited for content and length.


Journal Reference:

  1. Pilar Rey-del-Castillo, Jesús Cardeñosa. Fuzzy min–max neural networks for categorical data: application to missing data imputation. Neural Computing and Applications, 2011; DOI: 10.1007/s00521-011-0574-x

Cite This Page:

Facultad de Informática de la Universidad Politécnica de Madrid. "New system increases reliability of opinion polls." ScienceDaily. ScienceDaily, 27 April 2011. <www.sciencedaily.com/releases/2011/04/110426071145.htm>.
Facultad de Informática de la Universidad Politécnica de Madrid. (2011, April 27). New system increases reliability of opinion polls. ScienceDaily. Retrieved August 29, 2014 from www.sciencedaily.com/releases/2011/04/110426071145.htm
Facultad de Informática de la Universidad Politécnica de Madrid. "New system increases reliability of opinion polls." ScienceDaily. www.sciencedaily.com/releases/2011/04/110426071145.htm (accessed August 29, 2014).

Share This




More Computers & Math News

Friday, August 29, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

JPMorgan Chase Confirms Possible Cyber Attack

JPMorgan Chase Confirms Possible Cyber Attack

Reuters - US Online Video (Aug. 28, 2014) — Attackers stole checking and savings account information and lots of other data from JPMorgan Chase, according to the New York Times. Other banks are believed to be victims as well. Fred Katayama reports. Video provided by Reuters
Powered by NewsLook.com
Spend 2 Minutes Watching This Smartwatch Roundup

Spend 2 Minutes Watching This Smartwatch Roundup

Newsy (Aug. 28, 2014) — LG announces a round-faced smartwatch, Samsung adds 3G connectivity to its latest wearable, and Apple will reportedly announce the iWatch on Sept. 9. Video provided by Newsy
Powered by NewsLook.com
Why Apple Might Add Mobile Payment Options To iPhone 6

Why Apple Might Add Mobile Payment Options To iPhone 6

Newsy (Aug. 28, 2014) — A report by Wired suggests Apple's next iPhone will feature a mobile payment system and near-field communication. Video provided by Newsy
Powered by NewsLook.com
Hackerspace Provides Hackers Creative Haven

Hackerspace Provides Hackers Creative Haven

AP (Aug. 27, 2014) — HeatSync Labs, a so-called hackerspace in Mesa, Arizona provides members and the public alike a space to allow their creative juices to flow and make their tech dreams into a reality. (Aug 27) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins