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2-15-11 - Chapter 7 Conducting a good experiment...

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2-15-11 Chapter 7 – Conducting a good experiment Participants o Types of Participants: we need to take into consideration the precedent, availability, and type of research project when deciding which participants to use. o Number of Participants: we need to take finances, time, availability, amount of variability in group and power into consideration when choosing number of participants. If we have a lot of different kinds of people, then we need a lot of participants If we have similar participants, then we don’t have to use that many o Power: probability that a statistical test (ANOVA) will be significant (our exp. Hypo. Will be accepted as true) Typically, more participants the higher the power. Stats books and previous research can help you choose the number of participants Apparatus IV presentation: the IV determines what apparatus you use o Certain IVs might require certain equipment Crying study (needed TV, DVD player); Music study (need some kind of music player); Animal study (need way for the animal to show learning, pigeon and light button) - DV recording: how the DV will be recorded o Don’t want the researcher to interfere or modify behavior
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