science

Multiple site entry technique

Multiple site entry technique is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Multiple site entry technique rather than just read about it. In short: The multiple site entry technique is a strategy that can be used in online research (also called Internet-based research or Web-based research) to target different samples via different recruitment sites and compare their data. It is a method used in behavioral and social research to assess the presence and impact of self-selection effects.

Key takeaways

Multiple site entry technique belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Multiple site entry technique to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Multiple site entry technique from memory before moving on to harder problems.

Reference excerpt

The multiple site entry technique is a strategy that can be used in online research (also called Internet-based research or Web-based research) to target different samples via different recruitment sites and compare their data. It is a method used in behavioral and social research to assess the presence and impact of self-selection effects. Self-selection effects can be considered a major challenge in social science research. 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. It can be assumed that there is no self-selection bias if the data sets coming from different recruitment sites do not differ systematically.

Method Several links to the study are placed on different websites, in Internet forums, social media platforms, or offline media that are likely to attract different types of participants, or are mailed out to different mailing lists. In order to identify the recruitment sources, the published URLs contain source identifying information and the HTTP protocol is analyzed by different referrer information. 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. The data file will have a column („source“) containing an entry of the referring source for each participant (“studentlist“). The collected data sets can then be compared for differences in results, and also for differences in relative degree of appeal (measured via dropout), demographic data, central results, and data quality

The figure illustrates the multiple site entry technique.

Impact Several studies have shown that the multiple site entry technique is a useful tool to determine the presence and impact of self-selection in online research (also called Internet-based research, Web-based research). 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. Moreover, this technique can be applied to different kinds of Internet-based studies, e.g. trauma surveys.

Fields of Application The multiple site entry technique has already been applied successfully in different research areas. For instance, Holbrook and Lavrakas discussed the multiple site entry technique in the field of experimental survey research. Moreover, it can also be used in a broader research context, e.g., in sex research and in health science.

References

Worked examples

Example 1 — a first encounter with Multiple site entry technique

Start with the simplest possible case. Write down what Multiple site entry technique claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Multiple site entry technique before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Multiple site entry technique ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Multiple site entry technique

In research: Multiple site entry technique appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Multiple site entry technique in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Multiple site entry technique is common in secondary-school and first-year university syllabi. It links to neighbouring topics Social science methodology, so understanding it makes those chapters shorter.
In everyday life: Look for Multiple site entry technique outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Multiple site entry technique in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Multiple site entry technique means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Multiple site entry technique out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Multiple site entry technique in simple terms?

Why does Multiple site entry technique matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Multiple site entry technique?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Multiple site entry technique.