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        | system of gathering data so that bias and error in measurement are reduced |  | 
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        | tentative explanation of a phenomenon based on observations |  | 
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        | the study of people or animals in their natural environment |  | 
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        | tendency of people or animals to behave differently from normal when they know they are being observed |  | 
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 | Definition 
 
        | tendency of people or animals to behave differently from normal when they know they are being observed |  | 
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        | tendency of observers to see what they except to see |  | 
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        | method of conducting research  in a controlled  environment |  | 
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        | study of one indivdual in great detail |  | 
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        | method of conducting research in the form of interviews |  | 
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        | randomly selected  sample of subjects from a larger population of subjects |  | 
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        | the entire group of people or animals in which the reseachers is interested |  | 
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        | a measure of the relationship between two variables |  | 
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        | a number derived from the formula for measuring a correlation and indicating the strength and direction of  a correlation |  | 
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        | changes in behavior result  allowing the determination of cause and effects relationship |  | 
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        | definations of a variables of interest that allows it to be measured |  | 
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        | permisson from a person to participate in an experiment after the risks and purpose of the experiment have been explained |  | 
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        | variables in an experiment that manipulated by the experimenter |  | 
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 | Definition 
 
        | variables in an experiment that represents the measurables response or behavior of the subjects in the experiments |  | 
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        | variables in an experiment that may unintenionally affected the dependent variables |  | 
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        | subjects in an experiment who subjected to the variables and who may receive a placebo treatment |  | 
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        | subjected in an experiment who are not subjected to the independent variables and who may receive a placebo treatment |  | 
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        | process of assigning subjects to experimental or control groups randomly so that each subject has and equal chance of being in either group |  | 
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        | phenomenon in which the expectations of the participants in a study can influence their behavior |  | 
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        | tendency of the experimenter expectations for a study to ununtentionally influence the results of the study |  | 
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        | study in which neither the experimenters nor  the subject know if the subjects are in the experimental or control group |  | 
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