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?
Main Types | Steps. What are the main types of quantitative approaches to research? It is easier to understand the different types of quantitative research designs if you consider how the researcher designs for control of the variables in the investigation. If the researcher views quantitative design as a continuum, one end of the range represents a design where the variables are not controlled at all and only observed.