extraneous variables- things that effect the DV apart from the IV
Control is vital.
Internal validity- What goes on inside the study.
External validity- The ability to generalise the results Different places or setting (ecological validity) Different people or population ( population validity) Different times ( historical validity)
Informed consent- to reveal the true aims of the study. From a researchers point of view they fear participants may guess the hypothesis. From a participants they should be told so they may make an informed decision if they wish to participate.
Whenever possible the psychologist should inform as fully as possible
Privacy- From a researchers point of view it is hard to not invade privacy when studying participants without their awareness.
Do not observe people without consent unless in a public place
Confidentiality- To keep the identity of the participant secret