Dr. gillis has decided to use in his research to guard against both experimenter bias and participant expectations.
a. confounding variables.
b. random selection.
c. the placebo effect.
d. the double blined design.
e. factor analysis

Which of these accomplishments is most closely associated with andrew young? becoming the first african american mayor of atlanta building an international terminal at atlanta's major airport securing atlanta as the host city for the summer olympics in 1996 enforcing non-discriminatory voting policies in atlanta and the suburbs

Describe briefly about great sunil tiwari

Rank the following from most to least devasting: ordovician,permaian,cretaceous, pleistocene