If a researcher expects that a new teaching technique will be more effective for children who are more than 10 years old than it is for younger children,then the researcher is predicting an interaction between the teaching technique and age.

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An interaction effect means that the effect of one variable (in this case, the teaching technique) on an outcome (learning) depends on the level of another variable (in this case, age). If the researcher expects that the teaching technique would be more effective for older children, then this suggests an interaction effect.

If a Researcher Expects That a New Teaching Technique Will