PSYCH291 Lecture Notes - Lecture 19: Internal Validity, Intentionality, Stanford Prison Experiment
16 Dec 2018
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Review of last class: independent-groups design (between-subjects design) Within-groups design (within-subjects design) fewer participants needed. Between-subjects design: design confounds: other variables (aside from independent variable) systematically differ between conditions. Design confounds occur when there is another variable: selection effects: the participants systematically differ between conditions. Participants better in one condition vs the other. Our experiment last class: regular speed condition and slow motion condition. Half the class watched video in regular speed, others had their eyes closed and visa versa results were insignificant. We replicated caruso et al (2016) regular speed, Paused (paused regular speed video in the middle), and. Paused condition was included to address a design confound (i. e. controls for length of video) Major issue that researchers face when designing an experiment: choosing an appropriate control condition. Don"t have to worry about imbalances within groups - you have the same participants in both groups.
