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PSYC 310 Research Methods and Designs
I Lecture notes NEW UPDATE Concordia
University
, lOMoAR cPSD| 49762242
PSYC 310: Research
Methods & Design I
Chapter 10: Non-experimental & Quasi-
experimental Designs
Professor: LM Sparks
Date: Nov. 21, 2018
, lOMoAR cPSD| 49762242
Non- & Quasi Designs
• Experimentation involves
the manipulation of an IV
and measurement of its
effect on the DV
• Sometimes, however, the
researcher is not able to
manipulate an IV and must
therefore work with pre-
existing levels of the IV
• e.g., age, gender
, lOMoAR cPSD| 49762242
Non- & Quasi Designs
• In both non- and quasi-experimental designs, there is
no manipulation of the IV
• Researchers compare pre-existing groups on a DV of
interest
• Groups are defined by time or participant
characteristics
• e.g., college grad or not; age
• Both produce groups of scores to be compared for
significant differences
• No random assignment, no causality
• Groups can differ!
PSYC 310 Research Methods and Designs
I Lecture notes NEW UPDATE Concordia
University
, lOMoAR cPSD| 49762242
PSYC 310: Research
Methods & Design I
Chapter 10: Non-experimental & Quasi-
experimental Designs
Professor: LM Sparks
Date: Nov. 21, 2018
, lOMoAR cPSD| 49762242
Non- & Quasi Designs
• Experimentation involves
the manipulation of an IV
and measurement of its
effect on the DV
• Sometimes, however, the
researcher is not able to
manipulate an IV and must
therefore work with pre-
existing levels of the IV
• e.g., age, gender
, lOMoAR cPSD| 49762242
Non- & Quasi Designs
• In both non- and quasi-experimental designs, there is
no manipulation of the IV
• Researchers compare pre-existing groups on a DV of
interest
• Groups are defined by time or participant
characteristics
• e.g., college grad or not; age
• Both produce groups of scores to be compared for
significant differences
• No random assignment, no causality
• Groups can differ!
