Unit 0 Part 3: Conducting Psychological Research (Updated 2025)

The Scientific Method Overview00:00:51

Psychologists use the scientific method to validate assumptions. The process involves forming a theory, developing a testable hypothesis, selecting a sample, collecting and analyzing data, reporting findings, and undergoing peer review for replication.

Theories and Falsifiable Hypotheses00:01:42

Theories are collections of observations and ideas. A strong hypothesis must be falsifiable, meaning it is a testable prediction that can be proven wrong through experimentation, which helps minimize confirmation bias.

Operational Definitions and Replication00:04:54

Operational definitions provide precise, measurable descriptions of procedures and variables. These definitions are essential for replication, allowing other researchers to repeat the study to verify the reliability of the results.

Sampling Strategies00:07:00

Researchers select a sample from a target population to infer conclusions. A good sample is both random (every member has an equal chance) and representative (demographically reflects the population) to avoid sampling bias and allow for broader generalization.

Peer Review and Publication00:10:25

Before publication, research undergoes peer review, where experts evaluate the methodology and findings. This critical checkpoint ensures that published research is accurate, valid, and founded in evidence.