exam one Flashcards
standardization
a comparison tool: how does ones score compare to others
reliability
are the results consistent
validity
are the results accurate, measured accurately
magnitude
is the scale measuring a relative amount, are the numbers representing labels
equal intervals
is the difference between two points on a scale consistent across the scale
absolute zero
is there a point at which the scale can truly detect a nothingness
nominal
categorizes (qualitative)
ordinal
categorizes, ranks in order (qualitative)
interval
equal intervals (quantitative)
ratio
has a true zero
central limit theorem
if the sample size is large enough, the sampling distribution will be normal
criterion referenced tests
assesses performance based off standards
norm referenced tests
standard deviation
shows variation in a data set
z-score
deviation of a score from the mean in SD units, (individual score-mean score/SD)
why do we need standardization?
to give raw data meaning
mccall’s t (t-score)
used for personality testing, mean is set at 50, SD is 10
dichotomous scaling method
offers two choices for each question
polytomous scaling method
multiple choice test
likert scaling method
pick which one represents their response
category scaling method
similar to likert but with more choices
reliability coefficient
measures the inter-item correlations in the connect of the number of items
what is the correlation coefficient called?
cronbachs alpha
test retest reliability
test once and come back to retest