The basic structure of a research experimentStructure: Psychologists use different types ofresearch like descriptive, correlational and experimental. Each of them requiresdifferent ways of statistic analyses and have a different view on the question. Is some studies methods are combined.Experimental is used to check whetherthe hypothesis is true and to understand the causes of behavior. Hypothesis shouldbe well structured based on observations, highly educated guess, “If we do A,than B will happen”. It can be a review on previous research or new theory.
The advantage of this method is that scientisthave more control over situation. The disadvantage is that it can be artificialbecause participants understand that they are taking part in the research. First of all, the hypothesis is formed. It contains the two variables: independent, which should be controlled and manipulated, dependent variable is based on our original hypothesis. The participants are divided randomly for control group and experimental group.
Groups should be as similar as possible. Data is collected and interpreted to evaluate it. When the whole study is done it goes under the peer review. Peer review is when your competent colleagues analyze and check your work. Moreover, usually the replication is done with same hypothesis and same conditions to check whether the whole experiment is true. If it meets coincidence it means that the first experiment was susceptibleAfter everything is done the study can be published.
Hypothesis is a falsifiableprediction that can be tested and measured, it describes what you expect tohappen in certain conditions, defines the connection between two variables, hasdependent and independent variable. The purpose is to find answer to thequestion.Independent variable is the part thatcan be tested and changed, happens first, represents the outcome, effects ondependent variable. Dependent variable is measuredthought experiment as a result.Control group is separated fromothers and being tested, usually held on normal conditions.
Experimental group is the group owhich experiment is performed.Random assignment is when all theparticipants assigned randomly(by chance) to control group and experimentalgroup to make sure that differences within the group are not systematic.