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the between-groups design

Between-groups Design. Correlational vs. Experimental Research. 2 Types of Experimental Research. 1) ______ ExperimentIV________ AssignmentCause/Effect2) _____-ExperimentIV___ _________ Assignment________ variablesCause/Effect. The Simple Experiment. ______ ExperimentRandom assignmentOnly __ levels of the IV.

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the between-groups design

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    1. The Between-Groups Design

    3. Correlational vs. Experimental Research

    4. 2 Types of Experimental Research 1) ______ Experiment IV ________ Assignment Cause/Effect 2) _____-Experiment IV ___ _________ Assignment ________ variables Cause/Effect

    5. The Simple Experiment ______ Experiment Random assignment Only __ levels of the IV

    6. Hypotheses 1) Experimental 2) Null ________ prove the Null!

    7. Independent Variable (IV) Variable to be ___________ 2 Levels of IV Experimental Group – ________ to IV Control Group – ___ exposure to IV; called “No treatment or _______ control group”

    8. Dependent Variable Variable to be _________ Statistical significance You are sure beyond a _________ doubt that difference observed was ____ due to chance “Reasonable doubt” – about 95% sure that treatment was responsible for difference between groups (p=.___)

    9. Type I Error Saying a difference between groups was significant when in actuality it was ____ “Crying Wolf” Ex: Physician making a “false positive” diagnosis; saying you are pregnant when really you aren’t

    10. Type II Error ____________ a genuine treatment effect “Failing to announce the wolf” Ex: Physician making a “false negative” diagnosis; saying you aren’t pregnant when really you ARE

    11. Possible Outcomes

    12. T-test Statistic used to analyze “_______ experiment” (2 means) Data must be on _______ or ______ scale

    13. Multiple Group Experiment More than __ levels of IV Reasons to use: Increase _______ validity Identify _________ relationship Increase construct validity Avoid _________ Effect & Demand Characteristics

    14. Power Ability to find a __________ ________ difference Ability to avoid Type ___ error

    15. Ways to Increase Power 1) Use _____________ participants 2) ________ sample size 3) Create _______ effects from treatment

    16. Analysis of Variance (ANOVA) Statistic used to analyze “________ _____ experiment” _______ _____ tests Used if __________ results from ANOVA Determines which (from 3 or more groups) where the difference is located

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