Research Flashcards
Face validity
degree to which the procedure make sense to the users
Construct validity
overall validity; does the test represent what it is supposed to
Content validity
assessment that the content of the measure is consistent with what is to be measured
External validity
can the results can be generalized to different subjects, settings and times
Criterion-related validity
comparing the results of a test to those of a test that is accepted as a gold standard test
T-test:
Determines a difference between TWO groups. Only used if there is one dependent and one independent variable
ANOVA
three or more conditions or groups are compared, it is used to determine if the observed differences among a set of means are greater than would be expected by chance alone
Purposive sampling
intentionally selecting participants based on their characteristics, knowledge, experiences, or some other criteria
Convenience sampling
sampling method where data is collected from an easily accessible and available group of people
Quota sampling
researchers choose these individuals according to specific traits or qualities. They decide and create quotas that can be generalized to the entire population.
quota on the age groups of 21-30, 31-40, 41-50, and 51+ for smokers
Snowball sampling
subjects provide referrals to recruit samples required for a research study
Negatively skewed bell curve
also known as left skew
apex of curve to to right of median
mean is lower than the median and mode
Positively skewed bell curve
apex of curve to to left of median
mean is higher than the median and mode
Test with high specificity will be good at identifying
true negatives
example: if 99% of people who test negative are truly negative than this is a specific test
Test with high sensitivity will be good at identifying
true positives
