Name of false answer effect in surveys I'm looking for research I've read about a well known effect that happens when participants complete a survey, where they do not answer what they think is right, but what they think the researchers are expecting from them.
It can be a survey but it can also be something else...
This is called "demand characteristics":


  ... an experimental artifact where participants form an interpretation
  of the experiment's purpose and unconsciously change their behavior to
  fit that interpretation.


An example is:


  The good-participant role in which the participant attempts to discern
  the experimenter's hypotheses and to confirm them. The participant
  does not want to "ruin" the experiment.


Demand characteristics are a type of response bias:


  ... a general term for a wide range of cognitive biases that influence
  the responses of participants away from an accurate or truthful
  response. These biases are most prevalent in the types of studies and
  research that involve participant self-report, such as structured
  interviews or surveys.


Another related type of response bias is the "social desirability bias":


  ... the tendency of survey respondents to answer questions in a manner
  that will be viewed favorably by others.