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Definition
| A type of non probabilitysampking in which units to be observed are selected on the basis of the researchers judgement about which ones will be the most useful or representative |
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| A non probability sampling method, often employed in field research, whereby each person interviewed maybe asked to suggest additional people for interviewing |
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| A type of non probability sampling in which units are selected into a sample on basis of prespecified characteristics, do that the total sample will have the same distribution of characteristics assumed to exist in the population being studied |
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| A type of probability sampling in which the units composing a population are assigned numbers. A set if random numbers is then generated and units having those number are included in the sample. |
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| A type of probability sampling in which every "kth" unit in a list is selected for inclusion in the sample - for example every 25 students in the college directory. |
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| Stratified samples aka stratification |
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| The process of grouping the members of a population into relatively homogenous strata before sampling, improves the representatives of a sample by reducing the degree if sampling error. |
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| A multistage sampling in which natural groups (cluster) are sampled initially with the members of each selected group being sub sampled afterwards. |
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| The study of recorded human communications, such as books, websites, paintings, and laws. |
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| Nonrigorous somewha resmbling controlled experiment but lacking key elements such as pre-and posttesting and/or control groups. |
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| the most conventinal type of experiment involves three major pairs of components 1) independent and dependent variables 2) pretesting and posttesting and 3) experimental and control groups. |
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| Independent and dependent variables |
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Definition
| A independent variable is presumed to cause or determine a dependent variable. |
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Definition
| in connection with hypothesis testing and test of significance, that hypothesis that suggest there is no relationship among the variables under study. you may conclude that the variables are related after having statistically rejected the null hypothesis. |
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Definition
| the remeasurement of a dependent variable among subjects after they have been exposed to a stimulus representing and independent variable. |
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Definition
| the measure of a dependent variable among subjects before they are exposed to a stimulus representing an independent variable. |
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Term
| experimental and control groups |
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Definition
expermental group: in experimentation group of subjects to whom an experimental stimulus is adminstered.
Control group: does not recieve the experimental stimulus. |
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Term
| nonequivalent control group |
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Definition
| a control group that is similar to the experimental group but is not created by the random assignment of subjects. |
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