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Psychology - Research Methods in Psychology

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Study GuidePsychology–Research Methods in Psychology1. Descriptive and Correlational ResearchAll scientific research starts withobservation and description. Before we can explain or predictbehavior, we need to carefully observe it. In psychology, there are several ways to describe behavior,includingcase studies, surveys, naturalistic observation, interviews, and psychological tests.1.1 Case Studies•What it is:A case study is an in-depth study of asingle person or a small group.•Purpose:It helps researchers learn a lot about individual behavior or mental processes.•Example:Sigmund Freud developed psychoanalytic theory by carefully studying patients withemotional problems over many years.Pros:Provides rich, detailed information.Cons:Time-consuming andcannot represent large populations.1.2 Surveys•What it is:Surveys ask people questions about a topic, often using a large and diversesample.•Example:The famous Kinsey survey on sexual behavior.Pros:Can collect information from many people quickly.Cons:•Respondents maynot represent the whole population.•People mightnot answer honestlyor may skip questions.1.3 Naturalistic Observation•What it is:Observing people or animals in theirnatural environmentwithout interfering.•Example:Studying lions in the wild instead of in a zoo, or observing children at home ratherthan in a lab.

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Study GuidePros:Shows behavior as it naturally occurs.Cons:Researchers haveless controlover the environment.1.4 Psychological Testing•What it is:Standardized tests measure specificbehaviors or traits.•Examples:Intelligence tests, aptitude tests, achievement tests.Key requirements:•Reliability:The test gives consistent results.•Validity:The test actually measures what it is supposed to measure.1.5 Correlation•What it is:Correlation measures therelationship between two or more variables.•Purpose:It can show whether one variablepredictsanother.Important:•Correlation does not equal causation.Just because two things are related doesnot meanone causes the other.Example:•Boys sometimes score higher than girls on certain math tests, showing a correlation betweengender and math scores.•But this does not mean gendercausesdifferences in math ability.•Other factors—likedifferent educational encouragement, parental beliefs, or societalexpectations—can explain these differences.In short:•Descriptive research helps usobserve and record behavior.•Correlational research helps usunderstand relationshipsbetween variables.•Together, these methods provide a foundation for developing theories and furtherexperimental research.

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Study Guide2.Experimental ResearchWhen researchers want tounderstand cause and effect, they usually useexperimental research.Experiments are often conducted in alaboratory, which allows scientists tocontrol the environmentand carefully follow the steps of thescientific method.2.1 Formulating the ProblemEvery experiment starts with aquestion about behavior or mental processes.Example:A researcher might wonder ifbackground music affects typing speed.•The researcher defines the variables:oIndependent variable (IV):The factor being manipulated (e.g., background music).oDependent variable (DV):The factor being measured (e.g., typing speed).•Then, the researcher makes ahypothesis, a prediction about the relationship:oExample: “Increasing the loudness of background music will decrease typing speed.”Tip:Think of the IV as the cause and the DV as the effect.2.2 Designing the StudyNext, the researcher decideshow to conduct the experiment.•Laboratory studiesare common because they allow control over variables.•Example setup:All participants use the same typewriters in the same room.•The researcher also chooses a design:1.Between-subjects design:Two groups of participants with similar typing skills areexposed to different music levels.2.Within-subjects design:The same participants are tested under multiple musiclevels.Each design has pros and cons, and the choice depends on the research question and practicalconsiderations.
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Document Details

University
Texas A&M University
Course
Psychology
Subject
Psychology

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