quantitative chapter 10 Flashcards
What is scalar reliability
The reliability of individual research scales
what does test-retest reliability mean?
we are predicting to see if the same thing gets the same score twice
alternate forms reliability means
two instruments which are meant to make sure the measure is the same
what is split-half reliability
people’s answers to tests come from two sides of the test to avoid any time element which could affect it
hoyt analysis of variance reliability
similar to split-half, and is also internal
croenebach’s alpha
positive to negative recoding so that positive have high scores
some things which contribute to bad measurement:
item construction - if you have abiguous values, length of the instrument - how you’re measuring, administration of the test- context in which the test was given
Valididty
how to measure
when you test multiple correlation coefficients, what do you get?
criterion validity
predictive validity
whether someone’s score can predict future scores
what is factoral validity?
tells us how many groups there are in our instrument. when you think you are measuring apples, you are actually measuring granny smith apples, macintosh apples, ect.
what are some threats to validity?
the researcher did not know what scale to use, when you have a newly created measurer and you only try it once, interaction of different treatments-underlying variables
validity and reliability go
hand in hand
what does “faking” the results involve?
the respondent deliberately alters the results, lies, disobedience
the worst culprit of measurement is
bad items on the measure
