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20 Cards in this Set
- Front
- Back
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A priori
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"the former" before the study or analysis
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After only design
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experimental design w/2 randomly assigned groups- a treatment and a control group.
differs from true experiment in that both groups are measured ONLY AFTER the experimental treatment |
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After only nonequivalent control group design
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a QUASI-experimental design similar to the after only experimental design, but subjects are NOT randomly assigned to the treatment or control groups
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Antecedent variable
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variable that affects the DV but occurs BEFORE the introduction of the IV
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Attention control
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operationalized as the control group RECEIVING the same amt of "attention" as the experimental group
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Control
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measures used to hold uniform or constant the conditions under which is investigation
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Design
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the plan or blueprint for conduct of a study
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Experiment
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a sicentific investigation in which observations are made and data are collected by means of the charateristics of control, randomization, and manioulation
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Experimental design
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research deisgn that has the following properties: RANDOMIZATION, CONTROL, MANIPULATION
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intervening variable
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variable that occurs during an experimental or quasi experimental study that affects the DV
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Mortality
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loss of subjects from time 1 data collection to time 2 data collection
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Non-equivalent control group design
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QUASI-EXPERIMENTAL design similar to the true experiment, BUT subjects are NOT RANDOMLY assigned to the treatment or control groups
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One group (pretest-posttest) design
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design used by researchers when ONLY ONE group is available for study.
Data are collected BEFORE & AFTER an experimental treatment on 1 group of subjects. In this type of design..there is NO CONTROL GROUP && NO RANDOMIZATION |
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power analysis
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mathmatical procedure to determine the # for each arm (group) of a study
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Quasi- Experimental design
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study design in which the research initiates an experimental treatment BUT some charateristic of a true experiment is lacking
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Randomization (random assignment)
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sampling selection procedure in which each person/element in a population has an equal chance of being selected to etiher the experimental or the control group
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Randomization controlled Trial (RCT)
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research study USING A TRUE EXPERIMENTAL DESIGN
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Solomon four-group design testing
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an EXPERIMENTAL design with 4 RANDOMLY ASSIGNED groups--
pretest-posttest intervention group *pretest-posttest control group *a treatment or intervention group w/ONLY posttest measurment & a control group w/only a post test measurment |
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Time series design
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QUASI EXPERIMENTAL design used to determine trends before & after an experimental treatment.
Measurements are taken several times BEFORE the introduction of the experimental treatment, the treatment is introduced, and measurments are taken again at specified times afterwards |
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True or classic experiment
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"pretest-posttest control group design"
In this design, subjects are randomly assigned tgo an experimental or control group, pretest measurements are performed, an intervention or treatment occurs in the experimental group, and posttest measurements are performed |
