research methods

Question 1

independent variable

Answer 1

the thing that is varied in an experiment.

Question 2

dependant variable

Answer 2

the thing that the researcher measures in an investigation

Question 3

hypothesis

Answer 3

a clear precise, testable statement that is written at the beginning of an investigation. it states the relationship between the variables being investigated.

Question 4

variable

Answer 4

anything that can vary or change within an investigation

Question 5

null hypothesis

Answer 5

a statement of no-relationship (correlation or difference) between variables.

Question 6

extraneous variable

Answer 6

any variable apart from the independent variable which could have an effect on the dependent variable. if extraneous variables are not controlled, this means that the researcher can not know what really happened to change the dependent variable

Question 7

alternative hypothesis

Answer 7

states a relationship (correlation or differentiation) between variables. it is alternative to the null hypothesis