routine hearing-surveillance programme tests workers in a bottling plant. One worker has no hearing complaints, but his pure-tone audiogram shows a dip in hearing thresholds centred on one frequency. Which audiometric finding is the classic earliest indicator of noise-induced hearing loss?

A hospital group wants to introduce a new tele-rehabilitation workflow in all ten of its branches. Because an organization behaves like a living ecosystem in which one change ripples unpredictably through others, the ergonomist advises a cautious approach. Which strategy best reflects the lecture's advice for making change work when outcomes are unpredictable?

A hand therapist is fabricating a custom thermoplastic splint and must take precise millimetre measurements while the material is still mouldable. The clinic now closes her room door and diverts all calls and questions until she has finished. Which type of attention is this arrangement designed to protect?

A rehabilitation hospital must train all staff on a new falls-prevention protocol. The training manager plans a single four-hour lecture on one day, but an ergonomist proposes another plan with the same total time. Which training design best helps the new protocol pass from working memory into long-term memory?

A manufacturer redesigns the main menu of an electrotherapy unit, increasing the number of equally likely treatment options shown on one screen from 2 to 16. Clinicians report that they now hesitate longer before every selection. According to H = log2N, how much information must the clinician now process for each choice?

On a new electric hospital bed, the buttons on the side rail are arranged in a single row with identical shapes, and staff often raise the head section when they meant to raise the foot. The redesign places the head-section control at the head end and the foot-section control at the foot end of the rail. Which control-design principle does this redesign mainly apply?

hospital is deciding how to divide work between staff and a new automated pharmacy system. The design team wants each side to do the work it is actually built for. Which task should remain allocated to the human rather than the machine?

During a summer heatwave, a warehouse worker becomes confused, then has a seizure. His skin is hot and dry with no sweating, and his core temperature is measured above 40 degrees C. Which heat-stress disorder is most likely, and how should it be classified?

After a patient receives the wrong exercise programme, the clinic's response is to issue a written warning to the therapist, put up 'Be careful!' posters and repeat the general training session for all staff. Which approach to error does this response represent, and why is it likely to fail?

A hospital launches a project to reduce back-strain complaints among porters without lowering productivity. In the current phase, the ergonomist observes how porters bend, interviews them and reviews injury records, before any lifting aids are trialled. Which phase of the five-phase project approach is being carried out?