Which of the following threats to external validity happens when subjects receive unintended treatments?

Why were so many professionals fooled into believing that facilitated communication with people who had autism was possible?

A) Most were simply following the principles of communication established by early psychologists. B) They failed to be skeptical and entertain other interpretations of the findings. C) They were fooled by people who was masters at deception. D) There was extensive evidence that children with autism had higher level thoughts, and therefore, they naturally believed that those thoughts could be expressed if one was clever enough.

What is meant by the process of coding?

a.) scaling research b.) giving a numerical value to observations c.) recording data d.) measuring the impact of research