types of procedures Flashcards
1
Q
what are the two types of procedures?
A
- single blind
- double blind
2
Q
what are single blind procedures like?
A
- participants will not be told about the aim of the study
- details may be kept from participants such as which condition of the experiment they are in or whether there is another condition at all
- any information that may create expectations is not revealed until the end of the study to control for confounding effects of demand characteristics.
3
Q
what happens in a double-blind procedure?
A
- neither the participants nor the researcher who conducts the study is aware of the aims of the investigation (often a third party conducts the investigation without knowing its purpose)
4
Q
give an example of when a double-blind procedure may be used?
A
- during drug trials
5
Q
explain what placebos are
A
- they are fake drugs
- treatment may be administered to participants by someone who is independent of the investigation and who does not know which drugs are real and which drugs are placebos
6
Q
what are the benefits of placebos?
A
- if they don’t know what each participant is receiving then expectations cannot influence participants behaviour.
7
Q
what is the experimental group?
A
- the group that is given the real drug
8
Q
what is the control group?
A
- the group that receives the placebo (fake) drug
9
Q
why are control groups used?
A
- control is used in many experimental studies for the purpose of comparison
- if the change in behaviour of the experimental group is significantly greater than that of the control group, then the researcher can conclude that the cause of this effect was the independent variable (assuming all other possible confounding variables have remained constant)
10
Q
what is having two groups in an experiment called?
what can we also have?
A
- an independent groups design
- we can also have control conditions in a repeated measures design. Each participant takes part twice- once in the experimental condition and then in the control condition.
