Final answer:
To get a slacking coworker back on track, start with a supportive approach by offering assistance. If necessary, escalate the issue with tact, considering the workplace culture and preserving a positive work environment.
Step-by-step explanation:
If you spotted a coworker slacking off, the situation should be handled with professionalism and tact. Start by assessing the situation; they could have a valid reason for their decreased productivity. If it's appropriate, a gentle, supportive approach might be most effective initially. You could consider offering your assistance or asking if everything is alright. If the issue persists, it might be necessary to have a more direct conversation, or in some cases, to escalate the matter to a supervisor, always being sure to maintain respect for the individual's privacy and dignity.
However, it's crucial to consider your relationship with the coworker and the workplace culture, as these factors can greatly influence the best course of action. Always aim to preserve a positive work environment.