A researcher designs a study to assess the effects of individual versus group practice on problem-solving achievement of fifth-grade children. Two teachers in an inner city elementary school volunteer to participate in the study and decide to use the classes that they are already teaching. The teachers decide between themselves which method, either the individual or group method, their students will use. After a 10 week period, a problem solving test is administered to the children. Discuss the threats to internal and external validity in this study.

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The Answer of A researcher designs a study to assess the effects of individual versus group practice on problem-solving achievement of fifth-grade children. Two teachers in an inner city elementary school volunteer to participate in the study and decide to use the classes that they are already teaching. The teachers decide between themselves which method, either the individual or group method, their students will use. After a 10 week period, a problem solving test is administered to the children. Discuss the threats to internal and external validity in this study.

A Researcher Designs a Study to Assess the Effects of Individual