# dependent variable

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## variable

[var´e-ah-b'l]
something that changes; an attribute or property of a person, event, or object that is known to vary in a given study.
dependent variable in a mathematical equation or relationship between two or more variables, a variable whose value depends on those of others; it represents a response, behavior, or outcome that the researcher wishes to predict or explain.
extraneous variable a factor that is not itself under study but affects the measurement of the study variables or the examination of their relationships.
independent variable in a mathematical equation or relationship between two or more variables, any variable whose value determines that of others; it represents the treatment or experimental variable that is manipulated by the researcher to create an effect on the dependent variable.

## de·pen·dent var·i·a·ble

in experiments, a variable that is influenced by or dependent on changes in the independent variable; for example, the amount of a written passage retained (dependent variable) as a function of the different numbers of minutes (independent variable) allowed to study the passage.

## dependent variable

(in research) a factor that is measured to learn the effect of one or more independent variables. For example, in a study of the effect of preoperative nursing intervention on postoperative vomiting, vomiting is the dependent variable measured to determine the effect of the nursing intervention. Compare independent variable.

## dependent variable

An objective finding measured in an experiment that is expected to change as a result of an experimental manipulation of the independent variable(s).

## dependent variable

Epidemiology An outcome variable/variables that reflects other, independent, variables in the relationship being studied. See Variable.

## variable

1. any type of measurement, quantitative or qualitative, of which a series of individual observations is made so that it has, as a principal characteristic, the potential for variability.
2. has the quality of variability.

variable agent
an agent in the cause of a disease which is capable of variation in intensity, e.g. weather, as contrasted to one that is not variable, e.g. Salmonella dublin.
concomitant v's
in experimental design these refer to factors that affect the dependent variable, but are not themselves influenced by the treatment (e.g. age of animal). The effect of concomitant variables can be removed by suitable experimental design or by including them in the model.
continuous variable
one in which all values within a given range are possible, e.g. birth weights of calves.
variable costs
costs which vary with the dimensions of the activity. Includes seed, fertilizer, teat dip, worm drench. Called also direct costs. See also fixed costs.
dependent variable
1. in statistics the variable predicted by a regression equation.
2. a variable which depends on other variables for its value.
discontinuous variable
see discrete variable (below).
discrete variable
one in which the possible values are not on a continuous scale, e.g. the number of sheep in a flock.
endogenous variable
dependent variable.
exogenous variable
independent or predetermined variable.
independent variable
one not dependent on other variables but capable of affecting dependent variables, thus an input variable.
spatial variable
a measurement relating to area or location.
temporal variable
one relating to chronological time.
References in periodicals archive ?
For the other two dependent variables 'Improvement' and 'Enhancement', comparatively weaker but significant relationships exists with correlation coefficients of 0.
Model I first took at-home parental linguistic and cognitive stimulation (HmCog) as a dependent variable.
When studying the integrated information in Figure 6, it is possible to relate the independent variable in the bottom graph directly to the dependent variable in any of the other graphs.
We have chosen as a dependent variable the economic rate of return (ROA).
We investigated the influences of 12 independent variables (11 enzymatic activities and [5mTHF]) on 4 dependent variables (metabolite concentrations) at a nominal steady state in Eqs.
Employees' Psychological Disturbance is the dependent variable as only the organizational and economical effect of M&A has been taken in view.
And with the unemployment rate as the dependent variable, the coefficient on PRESIDENT changes only slightly, from -1.
In columns (1) to (3) we report results where the dependent variable is the level and first difference in number of academic publications at a university in a year.
2000), and count dependent variables (Longford; Raudenbush et al.
One variation of canonical correlations begins with a stochastic vector of dependent variables assumed to be normally distributed and a nonstochastic vector of exogenous variables.
When four lags of the dependent variables are included in the model, the coefficient on the Beige Book index decreases slightly in magnitude and remains significantly different from zero.

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