CMN 3102 Lecture Notes - Lecture 9: Design Of Experiments, Random Number Generation, Timbits

• School: University of Ottawa
• Department: Communication
• Course: CMN 3102
• Professor: Philippe Rousseau

Document Summary

However, it is possible that a third variable, introversion, is actually causing the other two variables to occur in the first place. Conducting an experiment: introduce the experiment and obtain consent. Historical flaw: occurs when some historical event has caused the sample to change in a way that is not measurable. 4: impact of 9/11 on how attuned participants are to crisis communication, should be mentioned as a limitation, if known. Regression of the mean: the tendency for extreme scores on one measurement to move (regress) closer to the mean on a later measurement causing a change that would normally not happen in the population. Selection threat: caused by whether or not the participants who have selected to participate in an experiment have some characteristics that could slant the findings of the study, university students who need extra credit vs. general population.