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Chapter 10( Research Methods)

Terms in this set (32)

What is an experimental design?
The general plan for selecting participants, assigning them to experimental conditions, controlling extraneous variables, and gathering data.
What is the principle of parsimony (Occam's razor)?
The belief that explanations for events should be simple until the simple explanation is no longer valid.
When can you use a t-test? when between subjects? when within subjects?
When you have 1 IV with 2 groups. Independent. Correlated.
What is a independent variable?
the aspect of the environment in which the experimenter manipulates.
what is a dependent variable?
the response that is measured.
What are the two groups in our experimental design?
participants who have received the IV and participants who have not received IV
What is an extraneous variable?
an undesired variable that may influence the DV.
----- of the IV is known to refer to the different treatment conditions.
Levels
----- group, in a two-group design of participants that receives the IV.
experimental group
---------- group, in a two-group design is the group that does not receive the IV.
control group
Define Random selection and random assignment.
random selection = a control technique that ensures that the members of a population have an equal chance of being picked for an experiment. random assignment= a way of assigning the participants to ensure that each participant has an equal chance of being in any group.
When we RANDOMLY ASSIGN participants to groups, we have created what are known as ------- groups.
independent groups
When we compare participants from randomly assigned groups, we are making a ------- comparison
between-subjects comparison
What is a confounded experiment?
When may confounding occur?
An experiment in which an extraneous variable varies with the IV. When participants are not equal before the start of the experiment.
--------- tends to create equal groups in the long run.
Random assignment
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