Einschränkungen der Studie betreffen die Generalisierbarkeit auf andere

You will mostly use this as a sentence starter. Since it ends with andere (other), you usually need to follow it with a plural noun. For example, you could say andere Kulturen (other cultures) or andere Altersgruppen (other age groups). It sounds very professional and intellectual. Use it when you want to sound objective. It is like putting a safety net under your claims so nobody can accuse you of overgeneralizing. You are basically saying, 'Don't take this as a universal law just yet!'

This is your best friend in a university setting. Use it in your Bachelor's or Master's thesis. It is perfect for the 'Discussion' or 'Conclusion' section of a paper. You can also use it in a professional meeting if you are presenting market research. If a colleague asks, 'Will this marketing strategy work in Asia too?', you can reply with this phrase to show you are being realistic. It is the ultimate 'proceed with caution' sign for data lovers.

Do not use this at a party or a casual dinner. If your friend says they don't like a movie and you reply, 'The limitations of your study concern the generalizability to other viewers,' they will think you have spent too much time in the library. It is way too stiff for texting or daily life. Avoid it in emotional arguments or when you are just sharing a personal opinion. It belongs in the world of facts, figures, and formal reports, not in a chat over coffee.

Germans take Wissenschaftlichkeit (scientific rigor) very seriously. In German academic culture, being 'too sure' of yourself can actually make you look less competent. Admitting the limits of your work is seen as a sign of high quality and deep understanding. There is a cultural respect for precision and nuance. By using this phrase, you are tapping into that tradition of German thoroughness. You are showing that you value truth over a flashy, but potentially false, headline.

If you want to vary your language, you can use Die Ergebnisse sind nicht ohne Weiteres übertragbar (The results are not easily transferable). Another common one is Die Stichprobe ist nicht repräsentativ für... (The sample is not representative of...). You might also hear Die Validität ist auf den untersuchten Kontext begrenzt (The validity is limited to the investigated context). All of these carry a similar 'don't over-apply this' warning, but the original phrase is the most standard way to address generalizability directly.