An experimental design
a. is one in which the investigator has direct control over at least one independent variable.
b. is less capable of providing evidence of causal relationships than is an exploratory design.
c. is less internally valid than a descriptive study.
d. should be used only in realistic situations.
e. is best suited for longitudinal analysis.
Question 2
Typically, __________ experiments have greater internal validity, and __________
experiments have greater external validity.
a. lab; field
b. field; lab
c. field; field
d. lab; lab
e. The internal and external validities are usually the same for both types of experiments.
The experimental approach used by Masui and Markert to identify cyclin and cyclin-dependent kinase (
turbine design
Feedforward control of breathing rate in an animal trained for athletic exercise.
Lake 226 at the Experimental Lakes Area divided in half.
Feedback control of the adrenal cortex.
Control of Molting in Crabs