Psychology Statistics Test Two Study Guide

Psychology Statistics Test Two Study Guide - The Experiment...

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This increases the odds for capture Create conditions conducive for observation Via control, Experimenter studies the critical phenomenon under conditions that are identical in all but one way Control This converts systematic error to random error Selection of individual participants What does an experimenter do? The hypothesis : a prediction made about a causal sequence. Ex.) heat Only the experiment causes this Cause : independent variable Ex.) aggression This is caused by the independent variable Effect : Dependent variable Experimental Conditions correspond to values or levels of the independent variable Present: experimental condition or group Absent: control condition or group Simplest case: 2 levels of independent variable. It is either present (hot) or absent (not hot) Ex.) it's very hard to operationalize aggression (hard to measure aggression) It's very subjective and depends on the person This is where science turns into an art and you can't really learn how to do this from a book Operationalization = make the abstract concrete Your subjects Extra-experimental conditions Sources of error Why does error exist? Error is anything outside of the influence of the manipulation/treatment/IV that has an influence or effect on the dependent variable Ex.) people treated the French paradox as a true experiment Systematic error : factors other than the independent variable that exert influence non-randomly Error: anything outside of the TRUE influence of the manipulation (the independent variable) that affects the dependent variable (the point of statistics is to parse influence from error) Obsessions: recurring/persistent thoughts, images. Intrusive, distressing. Typically, compulsions involve repeated behaviors or mental acts done to counteract obsessions Washing, checking, hoarding, arranging. OCSs are usually fidgety. Compulsions: attempts to neutralize the obsessions. Satan Unconscious struggle for control over unacceptable drives Neutral object is paired with a fearful stimulus. Compulsion is attempt to reduce the anxiety produced by the learned fearful stimulus. Soar throat? Maybe this is part of systematic error Causes: Organization called PANDAS PANDA theory is that strep antibodies inflame basal ganglia, causing OCD Noticed that kids would show OCD symptoms about a week or two after strep Infection Death in family Allergies Anything that can cause anxiety Known "forever" that almost any stressor can trigger OCD Is strep infection just another…… Example: OCD Parts of Experiment Each participant has an equal chance of being in any of the experimental conditions Random assignment of participants to condition Elimination of systematic error The Experiment Sunday, August 23, 2009 12:08 PM Psychology Statistics Page 1
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Random assignment distributes error randomly (evenly?) across conditions
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This note was uploaded on 02/02/2010 for the course PSY 44020 taught by Professor Josephs during the Fall '09 term at University of Texas-Tyler.

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Psychology Statistics Test Two Study Guide - The Experiment...

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