Radiation Health and Safety Test Research Methods & Evidence-Based Practice 5

Question 1

A survey instrument that gives consistent results on repeated use has high:

Accepted Answer

Reliability

Answer

Reliability refers to consistency of measurement across repeated trials.

Question 2

Which statistic is commonly used to measure agreement between two image readers beyond chance?

Accepted Answer

Cohen's kappa

Answer

Cohen's kappa measures inter-rater agreement corrected for chance.

Question 3

Why are anthropomorphic phantoms used in dose and image-quality research?

Accepted Answer

They allow repeatable exposures without irradiating human subjects

Answer

Phantoms simulate tissue so measurements can be repeated without exposing people.

Question 4

A retrospective study differs from a prospective study in that it:

Accepted Answer

Uses existing records of events that have already occurred

Answer

Retrospective studies analyze outcomes and exposures that already happened using past data.

Question 5

The primary role of an institutional review board (IRB) is to:

Accepted Answer

Protect the rights and welfare of human research subjects

Answer

IRBs review protocols to ensure ethical treatment of human participants.

Radiation Health and Safety Test Practice Test