Final answer:
The drug experiment for arthritis pain follows the principles of a randomized control trial, utilizing blinding and a placebo to ensure the validity and reliability of the results, free from experimenter bias or participant expectations.
Step-by-step explanation:
The principles of experiment design being followed in the case of testing a new pain medication for effectiveness in treating pain associated with arthritis include a randomized control trial, blinding, and the use of a placebo. When conducting a randomized control trial, participants are randomly assigned to either the treatment group receiving the medication or the control group receiving a placebo. This randomization helps to ensure that any observed effects are due to the medication itself rather than other variables. Blinding, in this context, likely refers to a double-blind design where neither the experimenters nor the participants know which group they are in, avoiding experimenter bias and participant expectations that could influence the results. The inclusion of a placebo allows for a comparison of the medication’s effectiveness against any potential placebo effect, where participants may experience improvements in symptoms simply because they believe they are being treated.