PSY 250 Lecture Notes - Lecture 8: Confounding, Content Validity, Construct Validity
Document Summary
Internal validity is the degree to which your study tests your hypothesis. Showing that variation in the dv is caused only by variation in the iv. Showing that the relation between the iv and the dv isn"t due to a confounding variable. Changes in the value of the outcome variable are solely related to the changes in the value of the predictor variable. Showing that co-variation between the measure variables isn"t due to a 3 rd variable. Internal validity is threatened by confounding and 3rd variables. Asking someone to rank mood on a scale from 1 to 5 with 1 being poor and 5 being fantastic- good face validity. Determining mood by colors of socks poor content face. Results agree with those of an established test. A school is looking to hire a new science teacher. Designed a test that covers all course that will be taught high content validity. Designed test that examines only biology low content validity.
