The tendency for researchers to believe that they see what they expected to see rather than observing what is really happening, is called

A) the Clever Hans effect.
B) the Garcia effect.
C) experimenter bias.
D) extrasensory perception.

Experimenter bias refers to the tendency of researchers to see what they expected to see, rather than what is actually happening. This bias can lead to inaccurate interpretations of data and can compromise the validity of research findings. The other options (A) Clever Hans effect, (B) Garcia effect, and (D) extrasensory perception do not refer to experimenter bias.