Research Design2

Research Design2 - 2/23/2011 Announcements • Chapter 6 HW...

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Unformatted text preview: 2/23/2011 Announcements • Chapter 6 HW due Friday • Hypotheses and Lit Review due March 23 Ethics • • • • Four Key Points of Experimental Concept (1) Assignment of groups randomly. (2) Pre‐test Measure. Human subjects Institutional Review Boards (IRBs) Informed consent Benefit/harm balance Interpretation • Post test – Pre test = Change • Exp. Group Change – Control Group change = experimental effect (3) Treatment. (4) Post‐test Measure. Variations on Classic Design • Precision matching – Intentional assignment into groups based on specific characteristics • Simple post‐test design – No pre‐test Common Problems in Experimental Design • • • • Limited external validity Selection bias Requires large sample Costly • Time series – Multiple post‐tests • Multi‐group design 1 2/23/2011 Field Experiments • Stimulus applied in real life setting • Can’t randomly assign participants to groups 2 ...
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This note was uploaded on 06/06/2011 for the course POLI 301 taught by Professor Mcatee during the Spring '11 term at South Carolina.

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Research Design2 - 2/23/2011 Announcements • Chapter 6 HW...

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