NBCE Research and Development 2

Question 1

A researcher wants to determine whether a new chiropractic technique reduces neck pain more than standard care. Which study design is most appropriate?

Accepted Answer

Randomized controlled trial

Answer

A randomized controlled trial is the gold standard for comparing treatment efficacy between two interventions.

Question 2

In a clinical study, the Hawthorne effect refers to:

Accepted Answer

Subjects changing behavior because they know they are being observed

Answer

The Hawthorne effect occurs when participants alter their behavior simply due to awareness of being studied.

Question 3

Which statistical measure describes the probability that a diagnostic test will correctly identify a patient without the condition as negative?

Accepted Answer

Specificity

Answer

Specificity is the proportion of true negatives correctly identified by a test (TN / TN + FP).

Question 4

A Type II error in hypothesis testing occurs when a researcher:

Accepted Answer

Fails to reject a false null hypothesis

Answer

A Type II (beta) error is a false negative — failing to detect a real effect that truly exists.

Question 5

Which level of evidence is HIGHEST in the evidence hierarchy for evaluating chiropractic interventions?

Accepted Answer

Systematic review with meta-analysis of RCTs

Answer

Systematic reviews and meta-analyses of multiple RCTs represent the highest level of clinical evidence.

(NBCE) National Board of Chiropractic Examiners Practice Test

(NBCE) National Board of Chiropractic Examiners Practice Test

NBCE Research and Development 2