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By Franklin Kramer

Variables Affecting Participant Honesty in Experimental Design: Further Manipulations of Coin Flipping in Mechanical Turk. By Franklin Kramer. What is Mechanical Turk?. Crowdsourcing web service Have turkers complete HITs for small amounts of money (most being 1-25 cents)

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By Franklin Kramer

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  1. Variables Affecting Participant Honesty in Experimental Design: Further Manipulations of Coin Flipping in Mechanical Turk By Franklin Kramer

  2. What is Mechanical Turk? • Crowdsourcing web service • Have turkers complete HITs for small amounts of money (most being 1-25 cents) • Can filter workers by specific criteria • Typical worker earns $1.40 (Horton & Chilton) • US Turkers are fairly representative of general population- much better than University participants (Ipeirotis)

  3. Background • Original experiment (Robert Mille) • 31/19 • Coin Flips with Bonuses (same or different) • 32/18, 23/27 • Coin Flips: A further look (time) • Die rolls (Suri et. al)

  4. Hypotheses to Test: • If people are going to lie, they will tend to choose the first result offered. • People are more likely to give honest answers when dishonesty is more transparent in potential results given. • Price will have little effect on results. • People are less likely to lie when they are more aware of what is at stake. • People will be less likely to lie when they feel representative of a group they belong to.

  5. Why? • Lying is a very interesting social phenomena • Benefit to lying minimal • Only detectable on large scale • MT is fairly representative • Valuable to understand how to best give valid results in MT

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