Dependent variable - The variable the researcher measures, Hypothesis - Clear, precise, testable statement, Extraneous variable - Any variable except the IV which could have an effect on the DV – they need to be controlled!, Lab experiment - Experiment which takes place in a controlled environment, Qualitative method - Data expressed in words, Opportunity sample - Taking p’s who happen to be there at the time, Open question - Respondents can provide their own answer rather than selecting from a list, Case study - An in-depth investigation of a single individual, group, institution or event, Reliability - Concerns the consistency of measurement, Validity - Concerns whether a result is true, valid research represents something that is real, Mode - Most common value in a data set, Mean - Mathematical average – add all numbers in a data set up and divide by the number of scores in the data set, Secondary data - Info gathered by someone other than the researcher before the current investigation, Quantitative - Information expressed in numbers, Scatter - Type of graph that represents the strength and direction of a relationship between co-variables in a correlation, Correlation - Used to investigate the relationship or association between two variables called co variables, Target population - Group that the researcher is interested in studying, Null hypothesis - Statement of no relationship, Independent variable - The variable that is varied (changed) in the experiment, Natural experiment - IV occurs naturally (e.g. age, ethnicity etc.) and therefore is not manipulated by the researcher,

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