Unit 6b CA517Unit 6b CA517 11

Unit 6b: Inadequate Unit 6b: Inadequate Designs and Design Designs and Design

CriteriaCriteria

Turkish Delight - Narnia

http://movies.radiofree.com/photos/the_lion_the_witch_and_the_wardrobe_08167.jpg

Unit 6b CA517Unit 6b CA517 22

Studying faulty designsStudying faulty designs

helps researchers helps researchers design better studiesdesign better studies by knowing what pitfalls to avoid. by knowing what pitfalls to avoid.

http://www.cognitive-edge.com/blogs/dave/Polar%20bear.png

Unit 6b CA517Unit 6b CA517 33

Do they measure what they’re Do they measure what they’re supposed to measure?supposed to measure?

Faulty designs are Faulty designs are discussed in terms of discussed in terms of internal validityinternal validity. .

Validity: Measures Validity: Measures what it’s supposed to what it’s supposed to measure.measure.

Unit 6b CA517Unit 6b CA517 44

Application ExampleApplication Example

Design an Design an experimental study experimental study using one or both of using one or both of these commercials.these commercials.

http://www.youtube.http://www.youtube.com/watch?v=EsOHcom/watch?v=EsOHk0JuHuYk0JuHuY

http://www.youtube.http://www.youtube.com/watch?v=xIk7Qcom/watch?v=xIk7Q_DJIgQ_DJIgQ

Unit 6b CA517Unit 6b CA517 55

External validityExternal validity

Concerned with how strong a statement the Concerned with how strong a statement the experimenter can make about the experimenter can make about the generalizabilitygeneralizability of the results of the study. of the results of the study.

  

                                                                                                                             

                                                                                     

Unit 6b CA517Unit 6b CA517 66

If you haven't already done so, go to the Protecting Human Research Participants Certification site. The process will take about 2-3 hours. Let’s do it now.

http://phrp.nihtraining.com/users/login.php

Info from Kerlinger & Lee and Sumser Info from Kerlinger & Lee and Sumser texts.texts.

Photos from Photos from www.waynelynch.ca/biography.htmlwww.waynelynch.ca/biography.html

http://aprn.org/wp-content/uploads/200http://aprn.org/wp-content/uploads/2008/05/polarbearcubs.jpg8/05/polarbearcubs.jpg

http://www.sciencedaily.com/images/2http://www.sciencedaily.com/images/2008/05/080508132549.jpg008/05/080508132549.jpghttp://cache.daylife.com/imageserve/http://cache.daylife.com/imageserve/

07H86oV5604RD/610x.jpg 07H86oV5604RD/610x.jpg Microsoft and AllPosters.comMicrosoft and AllPosters.com

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