According to a British survey of mephedrone users, what is the most common route by which the drug is self-administered?

Skepticism in scientific research means ________

a. acquiring knowledge by means of observation or experimentation b. refusing to accept empirical evidence c. believing a claim is true unless you have evidence that it is wrong d. treating conclusions, both new and old, with caution

Changes were made in the DSM-5 for which of the following:

a) schizoaffective disorder. b) delusional disorder. c) schizophreniform disorder. d) brief psychotic disorder.