Bess Has Conducted a Pretest-Posttest Control-Group Study to Raise Math

question 9

Multiple Choice

Bess has conducted a pretest-posttest control-group study to raise math scores among fifth-grade students who have failed math. She has controlled the potential problem of __________ because she has selected participants for the experimental and control groups from the same pool of extremely low-scoring participants.

• A) diffusion of treatment
• B) instrumentation
• C) selection
• D) statistical regression

---

Definitions:

Adjustment

The process of making small changes to achieve a desired result or fit.

Hospital Schedules

Systems and plans for the timing of medical services and procedures, staffing, and resource allocation within a hospital to ensure efficient and effective patient care.

Croup

A respiratory condition typically seen in young children characterized by a distinctive barking cough.