You read about some research that is assessing a new treatment for social phobia (a psychological disorder). Immediately you notice that the research may have been affected by both placebo effects and experimenter expectancy effects. You would now be concerned about which of the following?
A)External validity
B)Internal validity
C)Whether the new treatment is ethical
D)Meta-analysis

Question

Quizplus · Accepted Answer

Placebo effects and experimenter expectancy effects both directly impact the internal validity of a study by introducing potential biases that can affect the outcomes of the treatment being tested, making it difficult to attribute any observed effects directly to the treatment itself rather than these confounding factors.

You Read About Some Research That Is Assessing a New