Generalization is a key issue in:a. internal validityb. external validityc. a double-blind experimentd. a single-blind experiment

Generalization is a key issue in external validity.

External validity refers to the extent to which the results of a study can be generalized or applied to other situations, people, settings, and variables. If a study has high external validity, the findings can be generalized to other people and settings.

In contrast, internal validity refers to the extent to which a study is conducted so that it minimizes errors and biases, providing a high degree of confidence that the results are true and accurate.

Double-blind and single-blind experiments are research designs used to control for bias. In a double-blind experiment, neither the participants nor the researchers know who is in the control group and who is in the experimental group. This is done to prevent bias in the results. In a single-blind experiment, only the participants do not know whether they are in the control group or the experimental group.

So, generalization is not a key issue in internal validity, a double-blind experiment, or a single-blind experiment. It is a key issue in external validity.