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and here's your schmuck du jour brought to you by yoga the number one [People doing yoga by a lake]

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way to exercise while moving as little as humanly possible yeah all right

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here's your question a researcher is interested in whether or not exercise

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can improve the mood of people diagnosed with depression she decides to teach a [The question being written out]

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yoga class for 10 of her patients diagnosed with depression and will then

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compare their moods to 10 members in her usual yoga class the knowledge of the

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patient's diagnosis unknowingly influences the behavior of the

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researcher while she teaches the yoga class to her patient the instructor is

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extra kind and patient with the group compared to the way she usually treats

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members of the yoga class which of the following best describes the researchers

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behavior potential answers on your Center find your light and well it's [Pause prompt appears]

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just I'm away alright well start would be double-blind bias a basic blind [People sat looking at the sun rise]

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experiment is the minimum standard for all tests involving test subjects a [Two crowds of blindfolded people, control group and test group]

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blind experiment works a little something like this all of the group's

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being studied that's even the control groups have no idea which group they're [Guy walks past with a magnifying glass]

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part of this prevents any placebo effect from taking place however the researcher

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knows which group is which so the possibility of bias yes they'll exist [The research appears in a lab coat]

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however a double-blind experiment means that even the researcher doesn't know [Another research appears with a blindfold on]

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which group is which so that they can't unintentionally influence the outcome

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well this is a step further than the basic blind experiment and describes

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exactly what didn't happen in a given experiment long story short be as an

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easy no confounding variables describes an extraneous variables that correlates

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in some way with both the dependent and the independent variables if you're [The definition of confounding bias is shown]

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attempting to study the correlation between variables a and B it's probably

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not too productive to bring see into the mix and throw everything off however see [The letter C drops down and forces A and B apart]

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describes a piece of data not a behavior that means it's not our answer all right

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what about demand characteristic Adam and characteristic with

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context of psychology describes that tell that indicates to the participant [Definition of demand characteristics is shown]

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exactly what the researcher is looking for potentially influencing the

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participants behavior while the researchers extra creaminess might be

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seen as a demand characteristic well we're considering your overall behavior [Researcher handing over money to a participant]

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not a specific in so he isn't our answer what about experimenter preference that

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sounds exactly like what's going on here but before we namaste and call it a day [Guy puts his hands together and walks off]

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let's take a closer look experimenter preference is simply a made-up variation

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of the actual answer see experimenter bias the unconscious act of a researcher

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treating experimental groups differently is known as experiment or bias if a

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researcher knows which research subjects are assigned to which group he or she [Research pointing to one of the groups]

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may unconsciously skew the results a certain way by treating the depressed

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group differently from the control the researcher is exhibiting experiment or [The researcher gives a prize ribbon to one of the groups]

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bias now if you'd excuse us we have some yoga to get to have active yeah the [Guy watching yoga on the TV as he is laid on the couch eating]

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burrito is part of yoga don't question

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