Quantitative Research Methods Flashcards
Positivism and quantitative methods
- argue that society is an objective social reality that shapes our behaviour
- use research methods that produce quantitative data (information in numerical and statistical form) e.g. experiments, questionnaires, structured interviews, official stats
- structured nature of these methods mean that the data produced is reliable and representative
Experiments
laboratory experiments, field experiments and comparative method or ‘thought experiment’
Laboratory experiments
artificial environment where the researcher controls variables to discover their effect, aim of discovering a casual law
two groups:
experimental group and control group
The experimental group
are exposed to a variable (independent variable) to test its effect
The control group
not exposed to the independent variable
Lab experiments have man PET limitations
Practical
Ethical
Theoretical
Practical issues - lab experiments
closed systems - lab experiments are only suitable for studying closed systems where all relevant variables can be controlled
Individuals are unique - can’t ‘match’ members of the control and experimental groups exactly
Studying the past - can’t control variables that were acting in the past
Small samples - can only use small samples
Hawthorne effect - subjects’ behaviour may change because they know they are being studied
Ethical issues - lab experiments
Informed consent - gaining subjects’ agreement to take part, explained the nature, purpose and risk of experiment to them
Harm to subjects - research shouldn’t harm subjects w/o compelling justification
Treating subjects fairly - experimental group are seen to be benefiting e.g. pupils gaining from a trial teaching method, unfair to the control group
Theoretical issues - lab experiments
positivists favour lab experiments for their reliability
However, even positivists recognise problems. Interpretivists criticise lab experiments as lacking reliability
Reliability and hypnosis testing - lap exp
reliability is imp. because replication enables us to check researcher’s results. Positivists regard the lab experiment as highly reliable cus:
> original researcher can specify steps in the experiment, others can re-run it
> produces quantitative data, results can be compared
> detached and objective - researcher just manipulates variables and records results
Representativeness - lab experiments
imp. to positivists because they aim to make generalisations about behaviour, findings may lack representativeness or external validity
> small samples may mean findings can’t be generalised
> lack of external validity: the more control, the more unlike the real world the experiment becomes
internal validity may be lacking because of the artificiality of the lab environment
Interpretivism and freewill - lab exp
clim humans are diff from natural phenomena, we have free will and choice
> actions are based on meanings, not ‘caused’ by external forces, means they can’t be explained through the cause and effect relationships experiments seek
Field experiments
may be used to overcome the lack of validity of lab experiments
> they differ from lab experiments in two ways, take place in the subjects’ natural surroundings, and the subject don’t know they are in an experiment
> manipulates variables to see what effect they have e.g. Rosenthal and Jacobson manipulated teachers’ expectations by misleading them about pupils’ abilities
Actor tests and correspondence tests
are field experiments, to test for discrimination in employment. Brown & Gay sent a white and black actor for interviews for the same posts. they were both matched for age, qualifications etc, so any diffs in job offers could have been due to discrimination
The comparative method
another alternative to lab experiments
carried out only in the mind of the sociologist - ‘thought experiment’, it identifies two groups that are alike in all major respects except for the one variable we are interested in
It them compares them to see if this one diff has any effect e.g. Durkheim’s study of suicide
Questionnaires
written/self completion questionnaires are the most widely used form of social survey e.g. Census
respondent must provide answers to pre set qs, usually closed ended w/ a limited range of pre set answers, but can be open ended, where respondents are free to answer in their own words
Practical issues - questionnaires
- cheap to gather large amounts of data
- no need to recruit interviewers (do themselves)
- data easily quantified and can be computer processed to reveal relationship between variables
- data is often limited and superficial, need to be fairly brief so ppl take them
- low response rates are a major problem, can be caused due to faulty questionnaire design e.g. complex lang
- inflexible and can’t explore any new areas of interest, only snapshots
Theoretical issues: positivism - questionnaires
positivists prefer questionnaires, seen as representative, reliable, objective and detached method for producing quantitative data, testing hypotheses and developing casual laws.