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.
Centers for disease control and prevention guidelines
A typical low-side driver (LSD) which uses a control module to control the ground side of the relay ...
Apply direct thumb pressure into points along the upper trapezius from base of neck to shoulder. ...
Sample of a business card design.
The experimental protocol for recombination studies
Feedback control of ADH secretion