L1 - Research Design Flashcards
What is the IV?
The variable that’s manipulated by the experimenter.
What is the DV?
Variable that’s measured/ affected by the changes in the IV.
What are the levels of IV?
Different values/ conditions of the IV
What’s an extraneous variable?
Potential variables that could affect the DV
What’s a confounding variable?
Variables that have systematically (definitely) affected the DV
Why is it important to establish cause and effect?
To understand relationships and their applied relevance
What is the difference between correlation and causation?
Correlation doesn’t imply causation.
Experiments help establish causation.
What’s a true experiment?
An experiment in which every variable but the one being studied is controlled
What are the characteristics of a true experiment?
Manipulation of the IV
Control of extraneous variables
Measurement of DV changes
What are control groups used for?
Used to compare against the treatment group to establish baselines
What are placebo groups used for?
Used to account for the placebo effect in treatment studies
What are the 3 strengths of true experiments?
Isolates cause and effect
Controls extraneous variables –> improves validity
Replicable
What are the 3 weaknesses of true experiments?
Sometimes impractical
Artificial settings
Lack of personal accounts
What’s a quasi-experiment?
The manipulation of an independent variable without the random assignment of participants to conditions or orders of conditions
What’s an independent sample design?
Ppts are randomly assigned to different conditions
