Non-invasive sampling methods include saliva analysis, hair analysis, urinalysis, and breath testing. <br/>The importance of ...

Our third Methods 101 video explores some of the ways that nonprobability surveys differ from traditional probability-based polls. How do pollsters conduct surveys online and what does that mean for ...

This paper reports how three field sampling methods performed in different rooms and on different surface types and how they compare using two different metrics of concentration (μg/g) and loading (μg ...

Today, we're tackling archaeological sampling techniques. Sampling is a vital part of archaeology and archaeological research. As we cannot excavate entire sites, it's important to come up with ...

Considerable controversy has taken place between those who favor quota sampling and those who advocate area sampling in opinion polling. This article does not attempt to give a final solution to the ...

Vascular epiphytes are an important component of tropical biodiversity; however, because of problems associated with accessing them, it is hard to obtain a complete species inventory. It is faster and ...