• If you are citizen of an European Union member nation, you may not use this service unless you are at least 16 years old.

  • You already know Dokkio is an AI-powered assistant to organize & manage your digital files & messages. Very soon, Dokkio will support Outlook as well as One Drive. Check it out today!


test page

Page history last edited by PBworks 17 years, 10 months ago
Threats to Internal Validity
Threats to External Validity
One-shot case studyHistory, maturation, selection, and mortalityInteraction of selection and X
One group pretest-posttest designHistory, maturation, testing, instrumentation, interaction of selection and other factorsInteraction of testing and X. Interaction of selection and X.
Time-series designHistoryInteraction of testing and X
Pretest-posttest Control-group designNone (mortality according to Dr. Bass)Interaction of testing and X
Posttest-only Control-group designMortalityNone
Solomon-four group designNone (mortality according to Dr. Bass)None

Comments (0)

You don't have permission to comment on this page.