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?
The social work profession was built on these other disciplines, so it has historically used the quantitative approach to research. Examples of quantitative methods include survey methods, laboratory experiments, formal methods, and numerical methods. These methods are now being used in almost all social sciences. There are three primary types of quantitative research designs, experimental, quasi-experimental, descriptive, and correlational.