in designing experiments questions you should include; identify experimental method (lab or field) with justification, operationalised iv and dv, potential confounding variables and how to control them, experimental hypothesis (justification for it being directional or non-directional), null hypothesis, sampling technique with justification, sampling frame and population, experimental design with justification, type of data collected, ethical issues and how to deal with them, issues of reliability and how to deal with them, issues of validity and how to deal with them