control extraneous variables. Flashcards
How would you control demand characteristics/participant bias?
- independent semples design: ppl not exposed to both conditions of experiment, less likely to figure out goal (however this may decrease the validity, ppl only go thru once)
- debriefing: ask ppl if they know what is being tested, mention most things, but not aim/objectives ( have to take ethical considerations into acc)
- deception: not telling them the aim/objective of study, deciding them, telling them something else/close to experiment, needa take ethical considerations into acc - doesn’t leave ptsd or some shit.
How would u control order effects?
1) counterbalancing: AB - BA type shit. vary the order in which the conditions are tested.
2. have long pauses between conditions to avoid order effects as much as possible.
3. Filter task: clear/cleen their “mental pallets”, get em to forget abt study and do sum else in the mean time.
How would u control participant variably?
1) choosing a random sample - decreases chances of people having complete variances generally.
2) random allocation/assignment - randomly assigning ppl to diff grps, roll a dice, pick outta hat etc.
- larger numbers lower the chance that one group of participants will be much different than the other.
How would u control researcher bias and conformation bias?
1) researcher triangulation to control for confirmation bias: basically have more than 1 researcher (depending on pop size etc) collecting data to improve the validity.
2) Double blind control: researcher and ppl dk where and which grp they go into, - controlling for researcher bias, third party knows everything.
3) researcher should decide on a hypothesis and not change it aft the results have been recorded.
