Exam Chapter 4 and 5

For exam 2

73 cards   |   Total Attempts: 182
  

Cards In This Set

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Alternate form reliability
Reliability determined by correlating two forms of a test. also referred to as parallel or equivalent form reliability. Basic design is test retest.
Bivariate distribution
Representation of the relationship between two variables on a Cartesian (X, Y) coordinate system; also called a scatterplot.
Coefficient alpha/ Cronbach’s alpha
A measure of the internal consistency of items on a test, as the number of items increases, reliability increases. as the average interitem correlation increases, reliability increases. the formula shows that the alpha depends on the average correlation among items. number of items is important it relates to unreliability due to changes in content sampling and not due to changes in test administration, personal conditions, or scoring.
Confidence band
A band placed around a test score based on the standard error of measurement.
Constant error
An error that makes scores consistently higher or lower thank warranted for an individual or group of individuals due to factors unrelated to the test's purpose.
Correlation coefficient
The numerical expression, ranging from -1.00 to +1.00, of the relationship between two variables.
Error score
The hypothetical difference between a person's obtained score and true score.
Generlaizabilty theory
A method for studying reliability that allows for examining several sources of unreliable variance simultaneously. using a single study to determine reliability for several occasions, several forms, and several scores. ANOVA provides the framework.
Heterogeneity
Excessive differences among individuals, especially greater differences than normal. yields an inflated correlation.
Heteroscedasticity
Different degrees of scatter at various points along a best-fitting line. the standard error is not equal throughout the range of variables although it is calculated as if it were equal throughout.
Homogeneity
Yields a deflated correlation. less difference among individuals than is normal.
Homoscedasticity
Equal degree of scatter at various points along a best fitting line.
Internal consistency
Items that for the most part, are measuring the same trait or characteristic as indicated by the intercorrelations among the items.
Inter-scorer reliability
The degree of agreement about individuals' performance among different scorers of a test.
Intraclass correlation coefficient
A type of correlation expressing the degree of agreement among more than two raters or judges.