lecture 6 Flashcards
rules for translation human perceptions and thoughts to numbers
quantification rules
what is a systematic process of assigning numbers to characteristics
measurements
process of forming judgements and making decisions based on a variety of measurements
evaluation
any systematic deviation between the results of a study and the “truth”
scientific bias
what type of test bias favors one group over the other
content bias
type of bias that results rom a variety of external factors that influence test performance
testing situation bias
who pioneered intelligence testing
Alfred Binet
who is the pioneer of modern statistics
karl pearson
what is psychometrics
a discipline focused on the theory and application of psychological measurement
what is the item response theory
a paradigm for item analysis used in test scoring and construction that does not assume that all items are equally difficult
what is computerized adaptive testing
allows for adjusting item difficulty to the ability level of an individual
rationale for developing different levels of measurement
same number can represent different characteristics
what type of variable is drink size
ordinal
what measurement feature exists if the difference between two numeric values represents the same degree of difference in a measured characteristic
equal intervals
what does it mean to have an absolute 0
meaning 0 truly signifies the absence of a measured characteristic
what type of mode of measurement is a likert scale
ordinal
what is the classical test theory
a paradigm aimed to understand the reliability of tests that states that every measurement consists of the true score and a measurement error
what is measurement error
difference between observed score and true score
observed score - true score
it characterizes the extent to which a measurement is repeatable and free of measurement error
measurement reliability
focuses on consistency and reproducibility of a measurement (keyword: consistent results)
measurement reliability
describe an objective measurement
features clear and explicit scoring schemes
described as how well the measurement assesses the intended construct
measurement validity
what type of validity is whether a measure successfully does what it is intended to do
construct validity
type of validity when measures that should theoretically be related actually turn out to be
convergent validity
type of validity where scores that should not be related are not actually related
divergent validity
type of validity how well a measure represents the whole domain it seeks to measure
content validity
type of validity is a degree to which a measure intended to assess a given construct correlates with established measures of similar constructs
criterion validity
