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28 Cards in this Set
- Front
- Back
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Established by reliability testing, provides researchers and therapists with confidence that scores from assessments will be consistent at different times and across different raters |
consistency of results |
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Correctness of judgments depends on what three factors |
standardization, reliability, and validity |
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Describe intervals for ADL scores |
unequal; ratings do not necessarily represent equal intervals |
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Differences between measures and scores used in OT |
intervals, efficiency, precision, and transparency |
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Definition of transparency |
measures exist independently of the instruments used to generate them; distance can be translated across numerous instruments and converted across different scales |
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scores from most OT and healthcare instruments produce what? |
frequency counts and not measures |
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Inherent in producing scores instead of measures is: |
test dependency or instruments with different items, number of items, and rating scales generate different total scores |
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unidimensionality |
idea a measure should define a single, unidimensional variable; speed, weight, and length are all unidimensional constructs so FIM is multidimensional |
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Did Wright and Linacre think an assessment can ever achieve perfect unidimensionality? |
Nope; ideal of this must be approximated in a measure |
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Objective measurement defined as: |
repetition of a unit amount that maintains its size, within an allowable range of error, no matter which instrument is used to measure the variable of interest and no matter who or what relevant person or thing is measured |
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repetition of a unit amount that maintains its size refers to what concept? |
interval equality between units on the instrument |
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According to the definition of objective measurement measures must be free of what? |
tests; meaning different instruments should be able to generate comparable measures |
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What is the classical test theory? |
simple linear relationship that links observed score to sum of true score and error score (CTT); test dependent |
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Survey |
method of inquiry characterized by collecting data using structured questions to elicit self-reported information from a sample of people |
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Types of variables |
nominal, ordinal, interval, and ratio |
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Nominal variable example |
gender and race |
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ordinal example |
EKU #1, WKU #2 |
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Interval example |
Temperautre in |
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Ratio example |
there is an absolute zero, weight , or age |
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t-test tells us |
if there is a significant difference between two groups; compares means of two groups |
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Descriptive statistics provides us with: |
understanding characteristics of a population |
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ANOVA |
used to understand the relationship among different groups of people and/or variables (Analysis of Variance); compares means of more than one group; F statistic or p-value |
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null hypothesis |
there is no difference between your groups |
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Type I error |
you reject null when it is actually true (false positive) |
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Type II error |
Rejecting the hypothesis or accepting the null when the null is false (false negative) |
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MANOVA |
one independent variable but multiple dependent variables |
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multiple regression model |
a predictive linear model you create a formula that best describes the data to predict other values |
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Chi-squared x2 |
for comparison of nominal/categorical variables |
