00:01
How can we avoid experimental bias? is it a, not informing participants of a hypothesis? b, telling the subjects there are no right or wrong answers.
00:13
C, using a research strategy in which neither subjects nor experimenter know who is in the experimental or the control group.
00:22
Or d, having the experimenter use only nonverbal signals.
00:25
Okay, what is experimenter bias? this is where the experimenter influences their results because of their own actions.
00:37
It's usually unconscious, usually unconscious, and usually because of preconceived beliefs.
00:46
For example, if the experimenter is very confident in the drug that they are testing, and they know who is taking the placebo and who is taking the drug, perhaps their attitude towards ones taking the drug is different and gives them more confidence and so they could influence the results.
01:04
So how do we avoid this? is it a? well, this is a good idea in general.
01:09
You shouldn't let your participants know the hypothesis if it's something in psychology, for example, but it's not experimenter bias.
01:18
The participants preconceived notions of what they should or should not be doing aren't what we're looking at...