The term "effect size" refers to the ______.

A) statistical significance of a finding
B) use of double-blind techniques in experimentation
C) average standard deviation of all groups in an experiment
D) difference in mean scores,divided by the average standard deviation

Effect Size

Effect size is a quantitative measure of the strength of a phenomenon or the magnitude of a difference between groups in an experiment, often used in statistical analysis.

Statistical Significance

Indicates the likelihood that an observed effect or relationship exists because of chance within a predefined level of confidence, typically through a p-value.

Double-Blind Techniques

Research methods used to eliminate bias, in which neither the participants nor the experimenters know who is receiving a particular treatment.