Chap1 Flashcards
What is IV and DV
Independent variable: is deliberately manipulated by the experimenter in some way
Dependent variable: is the property measured in the research , depends on the IV
What is the population?
The group we wish to draw conclusions from
Sample def?
A smaller number of individuals from the population to participate in our research and represent pop
Radom sample
Sampling procedure where every member of the pop has an equal chance of being selected
Stratified sample
The process where the effects of a certain variable can be eliminated as a possible confound In an experiment
Done be ensuring that the variable is distributed within the sample in the same proportions as it is within the pop
What is the difference between E group and C
E group purpose is to show the effects of the IV on the value of DV
And the C group is to form a basis for comparison with the E group,
A method of controlling extraneous variables is by the design of the experiment, what are three experimental designs?
Repeated measures
Matched participants
Independent groups
Repeated measures ?
Using the same participants
Matched participants design
Involves using different but similar subjects in each condition of an experiment effort is made to match the subjects in each condition in important characteristics that might affect performance
Independent groups design
Using different subjects in each condition experiment- eg giving one group of subjects a driving test with no alcohol and a different group of participants the same test after one alcoholic drink
What does confounding variable mean
Any factor besides DV this that if it is not possible to determine which factor caused a change in the DV! Was it the IV or confounding variable , can’t tell.
Eg : did year 3 primary students literacy scores improve due to the new program (=IV) or a new teacher (=confounding variable)
