What is contamination in psychology?
n. 1. in testing and experimentation, the situation in which prior knowledge, expectations, or other factors relating to the variable under study are permitted to influence the collection and interpretation of data about that variable.
What is contamination in performance measure?
Criterion contamination occurs when the criterion measure includes aspects of performance that are not part of the job or when the measure is affected by “construct-irrelevant ” (Messick, 1989) factors that are not part of the criterion construct.
What is criterion in psychology?
n. (pl. criteria) a standard against which a judgment, evaluation, or comparison can be made. For example, a well-validated test of creativity might be used as the criterion to develop new tests of creativity.
What is criterion-related validity in psychology?
In psychometrics, criterion validity, or criterion-related validity, is the extent to which an operationalization of a construct, such as a test, relates to, or predicts, a theoretical representation of the construct—the criterion.
What are contaminating variables?
A confounding variable is an outside influence that changes the effect of a dependent and independent variable. This extraneous influence is used to influence the outcome of an experimental design. Simply, a confounding variable is an extra variable entered into the equation that was not accounted for.
What causes mental contamination?
The source of mental contamination is not an external contaminant such as blood or dirt but human interaction. The emotional violations that can cause mental contamination include degradation, humiliation, painful criticism, and betrayal.
What is construct contamination?
A criterion measure being influenced by something other than the performance related to the construct. Contamination is also often defined as the failure of an actual criterion measure to overlap with the ideal or the ultimate criterion measure.
What is construct related evidence?
Construct-Related Evidence. Definition: The extent to which an assessment measures the construct (e.g., reading ability, intelligence, anxiety) the test purports to measure.
What is criterion contamination?
a situation in which a response measure (the criterion) is influenced by factors that are not related to the concept being measured. Evidence of this may be observed through correlations of the response measure with variables that are conceptually distinct from that measure.
What does split half reliability mean?
consistency
Split-half reliability is a statistical method used to measure the consistency of the scores of a test. As can be inferred from its name, the method involves splitting a test into halves and correlating examinees’ scores on the two halves of the test.
What is discriminant validity in psychology?
Definition. Discriminant validity is demonstrated by evidence that measures of constructs that theoretically should not be highly related to each other are, in fact, not found to be highly correlated to each other.
What is contamination in a research study?
Contamination occurs when an inter- vention administered to an intervention group of an experimental study filters into the control group.
What is the definition of contamination in science?
CONTAMINATION. 1. the analysis and trial and error processes of allowing information, anticipations, or other elements concerning a variable under examination to impact the gathering and perception of information about such a variable. 2. the combination of at least two precise perceptions.
When does contamination occur in a data set?
Contamination can occur for several reasons, such as low reliability, rater bias, cheating, or other construct-irrelevant influences. Contamination is contrasted with criterion deficiency, where the criterion fails to measure important aspects related to the construct.
What does it mean when a criterion measure is contaminated?
Contamination is also often defined as the failure of an actual criterion measure to overlap with the ideal or the ultimate criterion measure. Contamination can occur for several reasons, such as low reliability, rater bias, cheating, or other construct-irrelevant influences.