The Four Validities
The Four Validities PSY 3213
Popular in Research Methods in Psychology
verified elite notetaker
Popular in Psychlogy
This 4 page Class Notes was uploaded by Emily Notetaker on Sunday February 14, 2016. The Class Notes belongs to PSY 3213 at University of South Florida taught by Dr. Brannick in Summer 2015. Since its upload, it has received 17 views. For similar materials see Research Methods in Psychology in Psychlogy at University of South Florida.
Reviews for The Four Validities
Report this Material
What is Karma?
Karma is the currency of StudySoup.
You can buy or earn more Karma at anytime and redeem it for class notes, study guides, flashcards, and more!
Date Created: 02/14/16
The Four Validities Construct o How well the variables in the study are measured or manipulated. Are they operational variables used in the study a good approximation of the constructs of interests Reliability & validity of measure variables o Consider meas. Of weight Bathroom scale Observer judgement Selfassessment (survey question) Validity (via manipulation check) of manipulated variable o Consider induction of negative affect by sad movie External o The degree to which the results of the study generalize to some larger population, as well as to other situations o Generalization: part of external validity. Applying the results from an experiment from an experiment to a different or broader population We wasn’t to take our results beyond the arrow confines of our specific experiment Consider resumé study by students acting as hired managers Statistical o How well the study minimizes the probabilities of two errors; concluding that there is no effect when in fact there is one; also addresses the strength of an association and its statistical significance. Frequencies: margin of error (+ or ) False alarms (Type I error) o Too many analyses Misses (Type II error) o Too small of sample size Strength of association o Magnitude of effect is not the same as statistical signinficance o There is a relation between IQ and birth order, but it is too small to be of practical interests Outliers, subgroups, and nonlinear relationships (to be covered during correlational designs lecture) o Sometimes our overall result is misleading because the mathematical model we use to represent the data does not correspond well to the data Internal o In a relationship b/w one variable (A) and another (B), the degree to which we can say that A, rather than some other variable (such as C), is responsible for the effect on B o The extent to which the observed effect is caused ONLY by the experimental treatment condition; freedom from confounds o The ability to draw conclusions about a causal relationship from our data o In sum: did your IV actually cause change that you observe in your DV, or was it something else? The tradeoff b/w internal and external validity Lab settings o High internal validity o Often artificial and findings can’t be generalized Low external validity Real life situations o High external validity o Hard to rule out other explanation Low internal validity Interrogating the 3 claims using the 4 big validities Interrogating frequency claims o Construct validity of the variable How well was the variable measured? o External validity is essential! Can we generalize from the sample to the population Interrogating association claims o Construct validity of each variable How well was each variable measured? o Statistical validity How strong is the association? Is it significant? o External validity To whom/what can we generalize the association *ALL IDEAS ARE NOT MY OWN. THESE ARE ALL COMPILED NOTES FROM PROFESSOR BRANNICK, AS WELL AS BETH MORLING, AUTHOR OF “RESEARCH METHODS IN PSYCHOLOGY”*
Are you sure you want to buy this material for
You're already Subscribed!
Looks like you've already subscribed to StudySoup, you won't need to purchase another subscription to get this material. To access this material simply click 'View Full Document'