Today’s Learning Outcome
B3- Discuss how and why particular
research methods are used at the
biological level of analysis.
I can explain the pros and cons of
different research methods at the
The measure of the whether an
experiment shows what will happen in the
Research Method #1: Case
A researcher observes the behavior of an
individual or group in depth.
Tests, interviews, and detailed observations.
Allows for an in depth analysis of a problem that
cannot be researched in other ways
May highlight extraordinary cases and theories
Not possible to replicate
Unrepresentative sample Low
Reliability/Can’t apply directly to the rest of
Research Method #2:
Investigations carried out under highly
controlled conditions to draw a
relationship between the IV and DV.
High Controls High Validity
Easy to replicate
Low Ecological Validity
Research Method #3:
Research designed to show the relationship
between two variables.
Positive Correlation: X Increases, Y increases
More Studying, Higher Test Scores
Negative Correlation: X Increases, Y Decreases
More TV, Lower Test Scores
Shows possible relationship between variables
Correlation ≠ Causation
A Relationship does not mean X caused Y to
For each research method…
Identify and list studies that demonstrate
For one study, explain why the research
method was selected, including the pros
and cons of the study.