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?
Surveys are the most popular research method in sociology because they allow sociologists to measure patterns related to attitudes (opinions, beliefs) and behaviors. Surveys include self-administered questionnaires that respondents fill out online or paper and face-to-face or telephone interviews.