Final answer:
The double-blind procedure would increase the likelihood that neither the experimenter's nor the participants' expectations would impact the results of a research project. The answer is option B.
Step-by-step explanation:
The procedure that would increase the likelihood that neither the experimenter's nor the participants' expectations would impact the results of a research project is the double-blind procedure.
In a double-blind study, neither the researchers nor the participants know who is in which group. This helps to control for both experimenter and participant expectations, reducing the chance of bias affecting the results.
By keeping both the researchers and participants blind to group assignments, the influence of expectation and the placebo effect can be minimized, leading to more reliable and unbiased results.