Variables
what are confounding variables?
an unmeasured third variable that influences both the supposed cause and the supposed effect.
an experiment done outside and has a independent variable that is environmental in nature
a natural experiment
Define a negative correlation
when one variable increases and the other decreases
what are repeated measures design in a research design?
multiple measures of the same variable taken on the same or matched subjects either under different conditions or over two or more time periods.
what is an extraneous variable?
a factor that can affect the outcome of a research study but is not being investigated
An experiment that is not randomly allocated and participants are group together on their traits and behaviors
a Quasi experiment
Define a positive correlation
when both variables are affected in the same way
what is an design involves pairing participants based on shared characteristics and then randomly assigning them to different groups
matched pairs
Describe the independent variable and give an example
variable that causes a change in other variables
ex: 2 plants one has one fertilizer and the other plant has a different fertilizer and see what change happends
define bidirectional ambiguity
When there is an uncertain correlation between variables and there is uncertainty about which variable is influencing which.
describe "experimental design"
refers to the method used to allocate participants to different conditions within a study
what is the dependent variable and give an example
the variable that is being measured
ex: the amount someones heart rate goes up in a study
Describe artificially
when a situation is created but it is very unlikely it would occur
What are extraneous variables also called?
Confounding variables
What is double-blind control
people do not know they are in the study