Which of the following procedures is a primary way of controlling the influence of demand characteristics in an experimental study?
Standardising the instructions given to all treatment groups
Employing a single-blind procedure so that participants do not know the research hypothesis
Utilizing a matched-pairs design to control for individual participant differences
Selecting a representative sample using stratified sampling techniques
201 exam-style questions on OCR A Level Psychology Planning and conducting research. Each one has a worked solution and a mark scheme showing where the marks go.