A researcher interested in studying the effect of hearing loss on self-esteem in adolescents in grades 6 through 12 would need to be aware of what type of threat to internal validity?
a. Testing
b. History
c. Mortality
d. Maturation
Question 2
The degree to which one can conclude that the independent variable, rather than extraneous variables, produced the change in the dependent variable is known as
a. effectiveness.
b. internal validity.
c. statistical validity.
d. Reliability.