Experimental psychology

We find twins that were separated at birth and give them questionnaires about their depressive symptoms. What kind of experiment is this?

As internal validity increases, external validity tends to decrease

Random assignment is required for all psychological studies

It is easiest to replicate which type of experiment?

Scholars at Stanford were interested in how observations of aggression impact behavior. Children came to campus to participate in a study. The independent variable (the type of model) was manipulated in three conditions: 1. Aggressive model was shown to 24 children. 2. Non-aggressive model was shown to 24 children. 3. No model is shown (control condition) – 24 children. What kind of experiment is this?

The more controlled the research design, the _____ its internal validity

These studies involve the manipulation of an IV

Lab experiments are uniformly ethical.

Demand characteristics are often less intense/present in:

Field experiments do not involve random assignment

Quasi-experiments use random assignment

Two confederates enter a crowded lunch area. One pretends to steal the other's wallet from their pocket in front of an observer. The researcher's evaluate the observer's behavior. This is an example of which type of experiment?