Conducting experiments - Chapter 9 Conducting experiments...

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Chapter 9: Conducting experiments External validity – defined as the extent to which results from a study can be generalized to other populations and other settings Manipulating the IV Setting the stage – supply info to participants Types of manipulations 1. Straightforward manipulations – manipulate IV 2. Staged manipulations – create some psychological state, simulate some situations that occurs in the real world Confederate – accomplice in experiment *However, complex manipulation is difficult to interpret and hard to replicate Strength of manipulation – maximizes differences and have high chance that IV has a statistically significant effect on the DV, Concerns – 1. Strongest possible manipulation may not occur in real world 2. Strong and possible within the bounds of ethics Measuring DV Self-report Behavioral measures – direct observations of behaviours 1. Frequency – no. of times behaviour occurs 2. Duration – how long behaviour occurs 3. Interval – frequency and duration Physiological measure – recording responses of body
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  • Spring '08
  • QUINTON,WJ
  • Psychology, researcher, Statistical terminology, Group Pretest-Posttest Design

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