Flashcards in Lecture 4 Deck (50)
What is the term for something that produces stable and precise measurements?
If we get the same results over and over again the results are?
How is reliability assessed?
Internal-consistency (cronbach's alpha)
What are the essential characteristics of a good measurement?
What is the term for when the instrument measures what it's supposed to?
What is test-retest reliability?
Reliability across time
Parallel/alternate forms is reliability?
Across different versions of a test/questionnaire
Internal-consistency reliability measures what?
Stability within the measurement instrument
In psychology we want our measures to have what reliability scores?
>/= .80 (strongly correlated)
If a measure is not reliable it can be what?
What are the 3 ways validity is assessed?
What measure includes all relevant content for the construct is't supposed to measure?
What looks like it's measuring what it's supposed to measure?
What measure coincides with present performance or predicts future performance?
What type of validity describes scores on a test being similar with other measures of the construct?
What type of validity accurately predicts future performance related to construct?
What measure captures the theoretical construct is was designed to measure?
Construct validity is established by demonstrating what two subtypes of validity over time?
What measure correlates with other measures related to the same construct?
Whta measure doesn't correlate with other measures that are not related to the construct?
Divergent (Discriminant) Validity
What does validity require?
You can have a measure with what?
What are the purposes for doing correlational research?
examined relationships between naturally occurring variables.
What is the purpose of a scatterplot?
describe strength and direction of relationship between variables
strength on scatterplot is indicated by what?
how close the points cluster together
direction on scatterplot is indicated by what?
whether the ling slopes up or down from L to R.
What are the types of relationships between variables as shown by scatterplots?
As one variable increases the other also tends to increase or as one decreases the other also decreases. This is know as what type of relationship?
As one variable increases the other tends to decrease or as one variable decreases the other increases. This is known as what type of relationship?