PSYC 4321 Lecture Notes - Lecture 4: Null Hypothesis, External Validity, Internal Validity
10 Feb 2017
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Defining a problem and stating a hypothesis. Hypothesis: statement predicting what can happen in a study. Null hypothesis: prediction that there is no relationship between a phenomena and the statement. Variable: factor or characteristic that can vary among samples. Dependent variable: factor that can be predicted. Independent variable: factor that can affect a dependent variable. Operationalization: way to measure or manipulate the variables in a study. Basic rights for all participants in a study. Should not be deceived into the study. Should be debriefed at the end of the study. Generalizability: applying what we have learned to other individuals or groups. Statistic used to represent the relationship between variables, denoted by the symbol r. Falls (cid:271)etwee(cid:374) (cid:1005). (cid:1004)(cid:1004) a(cid:374)d +(cid:1005). (cid:1004)(cid:1004) Positive correlation coefficient - as values of the independent variable increase, values of the dependent variable also increase. Negative correlation coefficient - as values of the independent variable increase, values of the dependent variable decrease.
