Lecture+II+-+Gen+Psych+Methods+Jan+24+2013

Psychological tests very difficult to create good ones

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: nce) Surveys – Sampling is the challenge here (how do you get a Sampling representative sample?) representative The Mother of all Studies The The experiment – Controlling the situation to determine cause and effect – Many examples of this – most published articles now Many are experiments are – It was more fun before – manipulation of subjects Stanford prison study Milgram’s obedience study – Now we have ethics committees Informed consent Follow-up explanations Nothing remotely harmful to subjects, including emotional harm Meet the Variables Meet Variable – Characteristic of behavior or Variable experience that is manipulated and assessed in an experiment assessed Independent Variables (IVs) – Variables that are manipulated in an experiment Dependent Variables (DVs) – Variables that are predicted to be affected by Variables manipulating the IV in an experiment manipulating Examples of IVs and DVs Examples We want to know the impact of eating Bak We choi on strength in kids choi – Two groups – one gets Bak choi in their diet for Two two months and the other does not. two – We measure how much weight the kids can lift We at the end of the experiment at – IV = Bak Choi (or no Bak choi) IV – DV = Amount of weight kid is able to lift Examples of IVs and DVs - II Examples Issue – does delivering negative messages about Issue drinking alcohol affect students’ drinking behavior? – Two groups – one gets negative messages about Two alcohol every day via email and the other does not. – At the beginning and end of the study, each student is At asked about how much alcohol they drink. – If there is a change in drinking habits, we MAY say that If negative messages affect drinking habits negative – IV = ??? – DV = ??? Examples of IVs and DVs - III Examples Issue: Does smoking cause cancer? Issue: – Two groups – one is made to smoke 40 Two cigarettes per day and the other smokes none. – At the beginning and end of the study, everyone At is checked for cancer. – IV = ??? – DV = ??? Examples of IVs and DVs - IV Examples Issue: Does looking straight at the sun make Issue: you blind? – Two groups – one is made to look directly at the Two sun at noon for an hour and the other looks at the ground. – At the beginning and end of the study, everyone At is checked for blindness. – IV = ??? – DV = ??? Examples of IVs and DVs - V Examples Issue: Does listening to your IPOD make Issue: you deaf? – Three groups – one is made to listen to their Three IPODs at full volume, one is made to listen at half volume and one does not listen at all. – At the beginning and end of the study, everyone At is checked for deafness. – IV = ??? – DV = ??? Issues To Consider with Experiments Experiments A Control group – one that is not given the same treatment as the experimental condition (e.g., PTSD drug testing) condition – Why would you need a control group? Why – What is the purpose of the control group? What...
View Full Document

Ask a homework question - tutors are online