Multiple site entry technique

With the invention of online research in the 1990s the multiple site entry technique became possible, because the recruitment of participants via different links (URLs) is very easy to implement.

[4] This means, a unique string of characters is appended to the URL for each recruitment source, e.g. “...index.html?source=studentlist” for a list of students.

[1][2] The multiple site entry technique helps to detect potential sampling problems, which in turn ensures the quality and generalizability in the data collection over the Internet.

[6][3] The multiple site entry technique has already been applied successfully in different research areas.

For instance, Holbrook and Lavrakas[7] discussed the multiple site entry technique in the field of experimental survey research.