Dr.Limmex is trying to get government approval for a new drug to treat anxiety.Dr.Limmex claims that 14 percent of the people who took this new drug reported reduced anxiety; however,other researchers claim that 14 percent of patients who receive no treatment also report reductions in their anxiety levels.What could explain patient improvement in Dr.Limmex's study

A)  improper assignment to groups 
B)  non-representative sampling 
C)  placebo effects 
D)  self-report bias

Placebo Effects

The phenomenon in which a person experiences a perceived improvement in condition due to their belief in the treatment's efficacy, despite it having no therapeutic effect.

Anxiety Levels

Refer to the intensity of feelings of worry, nervousness, or unease, typically about an imminent event or something with an uncertain outcome.

Reduced Anxiety

A decrease in feelings of worry, nervousness, or unease about something with an uncertain outcome, often as a result of deliberate action or therapy.