Final answer:
Internal validity refers to the degree to which a study accurately determines a cause-and-effect relationship between variables. The incorrect statement about internal validity is option d: High internal validity will lead to strong conclusions about generalizability to people.
Step-by-step explanation:
Internal validity refers to the degree to which a study accurately determines a cause-and-effect relationship between variables. The incorrect statement about internal validity is option d: High internal validity will lead to strong conclusions about generalizability to people. Internal validity is not directly related to generalizability; instead, it focuses on the extent to which the study design and control of confounding variables support the conclusion that the independent variable caused the observed effects on the dependent variable. High internal validity means that the study is well-designed, the researcher successfully controlled for confounding variables, and the experiment was conducted in a controlled setting. However, high internal validity does not guarantee that the findings can be generalized to the larger population.