What is a limitation that affects the generalizability of research results?

Generalizability is the process by which conclusions are drawn from a group of research results to create a scientific theory which is statistically probable. The conclusions drawn for example, from a study of a specific group in society can then be applied to a larger population to make a general conclusion. This can have issues based on the variables such as age, gender, location, which may provide less scope for the results; therefore if the study is not taken of a large enough cross-section of results, then it makes the generalizability limited.