# Correlation

In probability theory and statistics, correlation, also called correlation coefficient, indicates the strength and direction of a linear relationship between two random variables.

In general statistical usage, correlation or co-relation refers to the departure of two variables from independence, although correlation does not imply causality.

In this broad sense there are several coefficients, measuring the degree of correlation, adapted to the nature of data.

Note: This article excerpts material from the Wikipedia article "Correlation", which is released under the GNU Free Documentation License.

See the following related content on ScienceDaily:

### Heartbeat And Breathing Cycles

Jan. 30, 2007 — Heartbeat and breathing cycles can become synchronized, a new study shows. Some signs of phase synchrony have been found before, but only in small samples of a dozen or so subjects. By contrast, the ... full story
100% match
||||||||||||||||||||

find similar

### In Search of the Key Word: Bursts of Certain Words Within a Text Are What Make Them Keywords

July 17, 2012 — Human beings have the ability to convert complex phenomena into a one-dimensional sequence of letters and put it down in writing. In this process, keywords serve to convey the content of the text. ... full story
97% match
||||||||||||||||||||

find similar

### Quality of White Matter in the Brain Is Crucial for Adding and Multiplying (but Not Subracting and Dividing)

Jan. 27, 2014 — A new study has found that healthy 12-year-olds who score well in addition and multiplication have higher-quality white matter tracts. This correlation does not appear to apply to subtraction and ... full story
87% match
||||||||||||||||||||

find similar

### A Strong Welfare State Mitigates the Impact of the Great Recession

Oct. 23, 2014 — There is a general correlation between unemployment and suicide among men. But the weaker the unemployment protection in the country, the stronger the connection. These findings are reported in a ... full story
86% match
||||||||||||||||||||

find similar

### Online Learning Strategies of Male and Female Students

Nov. 24, 2012 — Researchers have determined the online learning strategies of male and female students in an English language ... full story
80% match
||||||||||||||||||||

find similar

### Quantum Entanglement Only Dependent Upon Area

Sep. 15, 2013 — Physicists have developed a new method for determining the amount of entanglement – a quantum phenomenon connecting two remote partners, and crucial for quantum technology - within part of a ... full story
78% match
||||||||||||||||||||

find similar

### Algorithm for Reducing Errors in Transcriptome Analysis

Aug. 18, 2014 — Researchers are proposing a new concept for signalome-wide analysis of changes in intracellular pathways, called OncoFinder, which allows for accurate and robust cross-platform analysis of gene ... full story
74% match
||||||||||||||||||||

find similar

### Small Step Towards Growing Tissue in the Lab

Mar. 19, 2014 — Mathematicians have devised a method for identifying how cell clusters have formed by analyzing an image of the cluster. Their modelling tool will be useful in helping biologists and tissue engineers ... full story
70% match
||||||||||||||||||||

find similar

## 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.

## 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