A psychologist examines the effect of a new therapy by first assessing patients' symptoms using a pretest,then administering eight weeks of therapy,and then administering a posttest.Based on this research design,the psychologists will be able to
A) make a causal claim about whether the treatment is effective.
B) make a claim about the applicability of the treatment to other potential patients.
C) both (A) and (B)
D) neither (A) nor (B)

Question

Quizplus · Accepted Answer

This design lacks a control group, so it cannot establish causality (A). It also doesn't address generalizability to other patients (B).

A Psychologist Examines the Effect of a New Therapy by First