1. nonlinear correlation any correlation in which the rates of change of the variables is not constant
  2. curvilinear correlation any correlation in which the rates of change of the variables is not constant
  3. nonlinear distortion distortion that occurs when the output signal does not have a linear relation to the input signal
  4. Kendall rank correlation a nonparametric measure of the agreement between two rankings
  5. negative correlation a correlation in which large values of one variable are associated with small values of the other; the correlation coefficient is between 0 and -1
  6. anaphoric relation the relation between an anaphor and its antecedent
  7. rank-order correlation the most commonly used method of computing a correlation coefficient between the ranks of scores on two variables
  8. indirect correlation a correlation in which large values of one variable are associated with small values of the other; the correlation coefficient is between 0 and -1
  9. chance-half correlation a correlation coefficient calculated between scores on two halves of a test; taken as an indication of the reliability of the test
  10. correlation a reciprocal connection between two or more things
  11. linear equation a polynomial equation of the first degree
  12. split-half correlation a correlation coefficient calculated between scores on two halves of a test; taken as an indication of the reliability of the test
  13. tetrachoric correlation a correlation coefficient computed for two normally distributed variables that are both expressed as a dichotomy
  14. positive correlation a correlation in which large values of one variable are associated with large values of the other and small with small; the correlation coefficient is between 0 and +1
  15. partner relation the responsibility of partners to act in one another's best interests
  16. direct correlation a correlation in which large values of one variable are associated with large values of the other and small with small; the correlation coefficient is between 0 and +1
  17. partial correlation a correlation between two variables when the effects of one or more related variables are removed
  18. phylogenetic relation (biology) state of relationship between organisms or groups of organisms resulting in resemblance in structure or structural parts
  19. vitelline circulation circulation of blood between the embryo and the yolk sac
  20. linguistic relation a relation between linguistic forms or constituents

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