Plastic Pasteur pipettes, also referred to as transfer pipettes, have their stems and bulbs in the form of a single piece made of plastic. There are different sizes. The volumes are usually marked on the stem, though the markings are rather crude and are not particularly accurate.
Research Methods in Sociology â An Introduction. An introduction to research methods in Sociology covering quantitative, qualitative, primary and secondary data and defining the basic types of research method including social surveys, experiments, interviews, participant observation, ethnography and longitudinal studies. Why do social research?
Sociological Research: Designs, Methods Sociologists use many different designs and methods to study society and social behavior. Most sociological research involves ethnography, or âfield workâ designed to depict the characteristics of a population as fully as possible. Three popular social research designs (models) are. 1  Crossâsectional, in which scientists study a number of individuals of different ages who have the same trait or characteristic of interest at a single time. 2  Longitudinal, in which scientists study the same individuals or society repeatedly over a specified period of time.