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An organized system of assumptions and principles that purports to explain and specified...
A statement that attempts to predict or to account for a set of phenomena; scientific...
: A precise definition of a term a hypothesis, which specifies the operations for observing...
The tendency to look for or pay attention only to the information that confirms one’s...
Methods that yield descriptions of behavior but not necessarily causal explanations.
A detailed description of a particular individual being studied or treated.
A study in which the researcher carefully and systematically observes and records behavior...
Procedures used to measure and evaluate personality traits, emotional states, aptitudes, interests,...
In test construction, to develop uniform procedures for giving and scoring a test
In test construction, established standards of performance.
In test construction, the consistency of scores derived from a test, from one time and...
The ability of a test to measure what it was designed to measure.
Questionnaires and interviews that ask people directly about their experiences, attitudes,...
A shortcoming of findings derived from a sample of volunteers instead of a representative...
A descriptive study that looks for a consistent relationship between two phenomena.
A measure of how strongly two variables are related to one another.
Characteristics of behavior or experience that can be measured or described by numeric...
An association between increases in one variable and increases in another or between...
An association between increases in one variable and decreases in another.
Coefficeint of Correlation
A measure of correlation that ranges in value from -1.00 to +1.00.
A controlled test of a hypothesis in which the researcher manipulates one variable to...
A variable that an experimenter manipulates.
A variable that an experimenter predicts will be affected by manipulations of the independent...
In an experiment, a comparison condition in which subjects are exposed to the...
A procedure for assigning people to experimental and control groups in which each individual...
An inactive substance or fake treatment used as a control in an experiment or given by...
An experiment in which subjects do not know whether they are in an experimental or a...
Unintended changes in subjects behavior due to cues inadvertently give by the experimenter.
An experiment in which neither the subjects nor the individuals running the study know...
Descriptive or experimental research conducted in a natural setting outside the laboratory.
Statistical procedures that organize and summarize research data.
An average that is calculated by adding up a set of quantities and dividing the sum by...
A commonly used measure of variability that indicates the average difference between...
Statisical procedures that allow researchers to draw inferences about how statistically meaningful...
Statistical tests that show how likely it is that a study’s results occurred merely...
A study in which subjects of different ages are compared at a given time.
A study in which subjects are followed and periodically reassessed over a period of time.
The amount of variance among the scores in a study accounted for by the independent variables.
The doctrine that human research subjects must participate voluntarily and must know...