Psych - 0.2B

A research method in which an investigator manipulates one or more factors to observe the effect on some behavior or mental process.

In an experiment, the group that is not exposed to the treatment; contrasts with the experimental group and serves as a comparison for evaluating the effect of the treatment.

The outcome factor; the variable that may change in response to manipulations of the independent variable.

The experimental factor that is manipulated; the variable whose effect is being studied.

In an experiment, the group that is exposed to the treatment, that is, to one version of the independent variable.

When the assignment of participants or units to the different conditions of an experiment is entirely randomized, so that each unit or participant has an equal likelihood of being assigned to any particular condition.

The extent to which a test measures or predicts what it is supposed to.

The degree to which a study or experiment is controlled in its internal structure.

The extent to which the results of research or testing can be generalized beyond the sample that generated them.

The extent to which the findings of a study can be applied to other settings, populations, or situations beyond the original study.

A factor other than the independent variable that might produce an effect in an experiment.

All the cases in a group being studied, from which samples may be drawn.

A subset of a population of interest that is selected for study with the aim of making inferences to the population.

The selection of participants from a population in an unbiased way so the sample accurately reflects the total population.

A sample that fairly represents a population because each member has the same fixed probability of being included in the sample.

Any process for selecting a sample of individuals or cases that is neither random nor systematic but rather is governed by chance or ready availability.

A systematic and directional error involved in the choice of units, cases, or participants from a larger group for study.

Experimental results caused by expectations alone; any effect on behavior caused by the administration of an inert substance or condition, which the recipient assumes is an active agent.

A procedure in which participants are unaware of the experimental conditions under which they are operating.

A procedure in which participants and researchers are unaware of the experimental conditions under which they are operating.

Any systematic errors in the research process or the interpretation of its results that are attributable to a researcher's behavior, preconceived beliefs, expectancies, or desires about results.

The bias or tendency of individuals to present themselves in a manner that will be viewed favorably by others.