PSYB01H3 Chapter Notes - Chapter 8: Ex Post Facto Law, Functional Magnetic Resonance Imaging, September 11 Attacks

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16 Apr 2016
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Experimenter can select participants who have a particular characteristic or studies participants who have been exposed to specified events such as trauma. When particular individual characteristics are used for the bases of selecting research participants, experimenter is often interested in studying the effects of these subject variables on a dependent measure. Subject variable = gender is treated as a type of iv. Natural treatment = when exposures to events and situations define how participants are selected. Exposure and nonexposure as two levels of the iv. Subject variables and natural treatments belong to a distinct class of ivs termed quasi-independent . Quasiexperiment: one that investigates the effects of quasi-independent variable on a dependent variable. Quasi = as if or to a degree . Resembles true experiment except for the degree to which an experimenter can directly control and manipulate one of more of the ivs.

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