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Lecture

# 6PSY210.doc

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Department
Psychology
Course
PSY210H1
Professor
John Vervaeke
Semester
Winter

Description
Ivy Quach PSY210H1S th Lecture 6 - Feb. 27 2012 Experimental Methods Science is about explaining the fact. Explanation needs causation. And to do so you need to manipulate variables. Science is providing good evidence to believe something not prove it. Bias –find evidence to support thesis. Things have multpule causes, and we try to isolate for the cause 1. Without theoretical debate you can’t have a good theory. This includes any experiment in theoretical debate. 2. Experiments changes independent which is dependent on independent variables Line of Best Fit allow one to construct infinite numbers of functions and since you can construct infinite amount of lines, inductive reasoning (Specific  General) is never certain. Deductive reasoning (General  Specific) is good but you learn nothing new. Theoretical Debate has 2 Functions: 1. Alternative that we can control (consider theory in theoretical debate) 2. Focus on, which one you’re going to test. Method of difference” manipulate x to seeif it predicts difference in the variable Theory , need it before and after -More control, decrease in ecological validity -Increase precision = decrease in generalization -increase in generalization = decrease in precision Experiments end with discussion not with results because you can’t conclude anything. You can discuss how your experiment is a reflection of the best experiment conducted with the result here present to support it but not prove it. Science doesn’t prove anything. Arugments therefore involve: Ivy Quach PSY210H1S • Reason of Why • Everyone will argue based on points • Why is your alternative the best, between precision and generalizability • More importance on phenomena, more debate there will be Experiments conducted with development are extremely difficult Control Variable (Group Study); requires big numbers of people • Must make/ have the same influence between both groups ( control and experiment) • Compare both groups o Ex. Kids watching Sesame Street vs Kids without Sesame street There is s difference between Proof and Evidence May have causation, science has bold arguments. Sciences claims that its experiments are best, and conclude cautiously Reversal Replication- tight use method of influence
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