Different tests in a test battery may correlate with (or "load onto") the "g" factor of the battery to different degrees. These correlations are known as "g" loadings. An individual test taker's "g" factor score, representing his or her relative standing on the "g" factor in the total group of individuals, can be estimated using the "g" loadings. Full-scale IQ scores from a test battery will usually be highly correlated with "g" factor scores, and they are often regarded as estimates of "g". For example, the correlations between "g" factor scores and full-scale IQ scores from David Wechsler's tests have been found to be greater than .95. The terms IQ, general intelligence, general cognitive ability, general mental ability, or simply intelligence are frequently used interchangeably to refer to the common core shared by cognitive tests.