experimenter effects, demand characterisitics and control issues

Question 1

what are experimenter effects

Answer 1

way an experimenter may influence the outcome

Question 2

what are demand charcteristics

Answer 2

cue in a research situation that communicates to ppts what is expected of them

Question 3

how to conrol experiments

Answer 3

standardisation - standardised instructions and procedure, improves reliability

single blind procedure - ppts unaware of aim, controls demand characteristics

double blind procedure - neither ppts or researcher knows aim, controls experimenter effects