experimental hypothesis

experimental hypothesis

the statement that there will be a statistically significant difference between the EXPERIMENTAL GROUP and the CONTROL GROUP, and that this difference will have been caused by the INDEPENDENT VARIABLE under investigation.

When an experiment is set up, or observational data collected, this is done in order to test a hypothesis, or theory, which has been developed from previous work. This is the experimental hypothesis, which states what the expected difference is between the groups if the theory is correct. The converse hypothesis, or NULL HYPOTHESIS, is also conventionally stated -that the predictions from the theory are incorrect. See also DEPENDENT VARIABLE, EXPERIMENTAL METHOD.

Collins Dictionary of Sociology, 3rd ed. © HarperCollins Publishers 2000
References in periodicals archive ?
To avoid possible variations in the confederates' behavior according to the experimental conditions, the confederates were not informed of the experimental hypothesis.
To avoid possible variations in the confederates' behavior according to the experimental conditions, the confederates were not informed about the experimental hypothesis. A pre-test was conducted in the street in order to train the confederates in the use of the procedure and to verify that they acted in the same way in the three experimental conditions.
However, the experimental hypothesis was not supported by the other two trials.
Therefore, researchers need to aim for the highest power they can achieve, as the failure to utilize an adequate level of power in a statistical test increases the danger of needlessly rejecting an experimental hypothesis.
These results support the experimental hypothesis that caffeine and ephedra do enhance total amount of exercise and total time of exercise.
Nonsignificant results could be due to the lack of power or to the experimental hypothesis being false.
The results of a two-way ANOVA indicated that the null hypothesis which stated that the chicken skin would not absorb more arsenic over increased periods of time was rejected, and the experimental hypothesis was supported.

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