Assessment CPCE Flashcards
nominal scales
most basic measurement, for naming or classifying only
ordinal scales
rank or order of nominal categories
interval scales
possess magnitude and equal intervals such as temperature and checklists of behaviors
ratio scale
possess magnitude, equal intervals, and an absolute zero. Time and height
Reliability
how consistently a test measures and the extent to which it eliminates chance and other extraneous factors in its results.
dependability, reproducibility, stability,and consistency
measurement error
the positive or negative bias within an observed score
correlation
statistic assess the degree to which two sets of measures are related, for example how a tested trait or ability is related to a behaviour.
test-retest for reliability
administer a single test twice, with some period of time between administrations
time is the source of error
you correlate the mean individual scores for each administration
limited by memory and practice effects
ears consistency over time
alternate forms/ parallel forms for reliability
equivalent or parallel forms of a test are administered either at the same time or with time between administrations
split half for reliability
a single test is divided in half, usually by odd and even numbers, and comparing the resulting two scores for each individual
interitem
a single test is assessed to determine how items or a test are related to one another and to the total score
interrater
two or more judges rate events or behaviours simultaneously
validity
the extent to which meaningful and appropriate inferences can be made from the instrument.
also asked whether test scores measure what they’re supposed to measure
invalidity
construct underrepresentation, failing to include components or dimensions of a construct in an assessment
construct irrelevant variance indicates there’s too much noise or excess dimensions
face validity
if the assessment “looks like” it is measuring what it is supposed to measure