It’s actually way more exciting than it sounds!!! It’s actually way more exciting than it sounds!!! Research Methods & Statistics.

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It is actually way more exciting than it sounds!!!!
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It’s actually way more exciting than it sounds!!! It’s actually way more exciting than it sounds!!! Research Methods & Statistics

Why do we have to learn this research stuff? Psychology is first and foremost a science… …So it is based in research.  Before we dive into how to do research, you should be aware of three hurdles that tend to skew our logic.

APPLIED VS. BASIC RESEARCH Applied Research has clear, practical applications. YOU CAN USE IT!!! Basic Research explores questions that you may be curious about, but not intended to be immediately used. Studying how kissing changes when you get older is interesting…but that’s about it. Research on therapies for drug addicts has a clear purpose.

Hindsight Bias The tendency to believe, after learning the outcome, that you knew it all along. After Amy Winehouse died my brother said he always knew she was going to die young. Did he really? Monday Morning Quarterback!

Overconfidence We tend to think we know more than we do. 82% of U.S. drivers consider themselves to be in the top 30% of their group in terms of safety. 81% of new business owners felt they had an excellent chance of their businesses succeeding. When asked about the success of their peers, the answer was only 39%.

3 Types of Research Psychologists conduct 3 main types of research: – Experimental-an investigation seeking to understand relations of cause and effect – Descriptive-drawing conclusions from observation & studies Case studies Surveys Naturalistic observations – Correlational-assessing the degree of association between 2 or more variables that occur naturally EX: Relationship b/w violent media & aggression in kids

Hypothesis Expresses a relationship between two variables A variable is anything that can vary among participants in a study Participating in class leads to better grades than not participating

INDEPENDENT VARIABLE Whatever is being manipulated in the experiment. Hopefully the independent variable brings about change. *If there is a drug in an experiment, the drug is almost always the independent variable.

Dependent Variable Whatever is being measured in the experiment. It is dependent on the independent variable. The dependent variable would be the effect of the drug.

Operational Definitions Explain what you mean in your hypothesis. How will the variables be measured in “real life” terms. How you operationalize the variables will tell us if the study is valid and reliable. Let’s say your hypothesis is that chocolate causes violent behavior. What do you mean by chocolate? What do you mean by violent behavior?

Sampling Identify the population you want to study. The sample must be representative of the population you want to study. GET A RANDOM SAMPLE. Ex: The amount of time spent on homework affects test scores. Study focused on Juniors at La Serna Must have all groups represented.

Random Assignment Once you have a random sample, randomly assigning them into two groups helps control for confounding variables. Experimental Group v. Control Group. Done to assure that each group has minimal differences

Hawthorne Effect But even the control group may experience changes. Just the fact that you know you are in an experiment can cause change. Whether the lights were brighter or dimmer, production went up in the Hawthorne electric plant.

Control vs. Experimental Group Experimental Group – The group that is exposed to treatment Control Group: the group that is NOT exposed to treatment – Serves as comparison to experimental group

Beware of Confounding Variables!!! If I wanted to prove that smoking causes heart issues, what are some confounding variables? The object of an experiment is to prove that A causes B. A confounding variable is anything that could cause change in B, that is not A. Lifestyle and family history may also effect the heart.

Single & Double Blind Procedure Want to avoid experimenter bias Single Blind: the subjects don’t know if they are in the control of experimental group Double Blind: neither the subjects nor the researcher know who is in the 2 groups – Requires 3 rd party has to participate to obtain data Placebo – An object/procedure given to control group so they think they are experimental group – Does not contain any of the tested material (IV)