In what two ways do the principles say psychologists could do harm?

The correct statement is that the psychologists can harm the clients by providing wrong or false or misleading information and by not taking the correct, necessary actions.

Psychologist are meant for curing the conditions of the person who are suffering from mental illnesses, trauma and stress, etc.

Hence, a psychologist can harm the clients by providing wrong or false or misleading information and by not taking the correct, necessary actions.

Learn more about psychological harm here:

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this null effect is caused by a weak manipulation and ineffective internal validity. in a scientific study, as the one dr. morimoto is trying to perfom, internal validity refers to the confidence placed in the cause-effect relationship and to how well an experiment is done and able to eliminate confounding variables.        

barack obama

i love this guy