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AP Psychology Videos 135 videos

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AP Psychology 3.2 Research Methods 11 Views


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Description:

AP Psychology 3.2 Research Methods. Which of the following examples demonstrates random assignment?

Language:
English Language

Transcript

00:05

And here's your shmoop du jour brought to you by the post

00:07

office that magical place where time stands still okay here's our question [Woman stood outside a post office]

00:13

which of the following examples demonstrates random assignment and here are

00:17

the potential answers.... alright well before we dive into the

00:25

wonderful world of random assignments and research and experimentation some [Walt Disney stood outside theme park]

00:28

rules need to be understood first the conditions of the experiment need to be

00:33

selected before the random assignment for example dividing groups into

00:36

cucumber eating and carrot eating groups, because that doesn't sound random at

00:40

all once these conditions have been selected we can choose participants from [Participants chosen from groups]

00:44

a large group of people who represent the population and find a way to

00:48

randomly assign them to each group without bias... alright now that we've

00:52

cleared that up let's take a look at our completely insane answer choices

00:55

starting with A.. let's disregard the part where Janine spent four years of her life [Janine inside a post office]

01:02

in a post office and take a look at her selection process.. is at random? Not

01:06

so much as a matter of fact Janine selection process is inherently biased [Janine selects woman from the groups]

01:10

who knows what sort of internalized selection biases were subconsciously

01:14

influencing who she asked to participate yeah we just hope Janine sn't going to

01:19

give her study another shot and spend four more years at the post office.. alright let's check

01:23

in good old Bill next... Bill hasn't actually defined any groups all he's

01:27

doing is asking people to fill out paperwork on their preferences since [Bill with preferences on clipboard]

01:31

he's not randomly assigning anything we can get rid of this option and maybe

01:34

Bill should relax and take in a movie or something..

01:39

well C doesn't cut it either because Anna is simply selecting the first 40

01:44

aardvarks to arrive, seriously she's studying aardvark in cucumber fields [Anna stood in a cucumber field]

01:49

why do we have a feeling Janine, Bill and Anna hang out together anyway waiting

01:55

for the first 40 prevents her selection from being entirely random we can nix

01:59

this answer and hope that our next researcher is a little more normal [Bill, Janine and Anna staring at answer D]

02:03

Jason's experiment isn't what we're looking for either though because it's

02:07

not really random to select a room full of only boys.. that's basically the

02:12

opposite of random it's modnar.. cool word, we should make that a thing

02:17

but we do give Jason points for not standing in a post office for four

02:21

years or studying aardvarjs.. that leaves us with E despite the fact that Jeff has

02:26

spent too much time with Anna and her aardvark he's our right answer he [Jeff with Anna in a field of aardvarks]

02:30

identifies his different groups assigns numbers and then allows the random blind

02:34

selection to determine which aardvark belongs in which group there's no

02:38

possibility for any sort of subconscious selection bias because Jeff himself

02:41

isn't making that decision the randomly selected numbers are way to go Jeff

02:46

maybe stop hanging out with Anna and her friend they don't seem like the best [Anna, Bill and Janine rock climbing]

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