POTENTIAL PROBLEMS IN EXPERIMENTAL RESEARCH

POTENTIAL PROBLEMS IN EXPERIMENTAL RESEARCH - o

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o POTENTIAL PROBLEMS IN EXPERIMENTAL RESEARCH Selection bias assignment of participants to experimental or control groups such  that differences among groups are present from the beginning; to  avoid this experimenters use  random assignment  Random Assignment  (assigning participants through chance, guaranteeing that all  participants have an equal probability of being placed in any  groups) Placebo Effect : phenomenon that occurs when a person's response to a  treatment is due to expectations regarding treatment rather  than the treatment itself -Placebo is the substance given to  control group to control -placebo effect (e.g. sugar pill)- subjects are unaware if they are in control group or  experimental group Experimenter Bias: when the researcher's preconceived ideas in some way  influence the participants behaviour and/or the interpretation  of experimental results-a self-fulfilling prophecy To eliminate 
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POTENTIAL PROBLEMS IN EXPERIMENTAL RESEARCH - o

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