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/sci/ - Science & Math


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4663277 No.4663277 [Reply] [Original]

Hello fellow /sci/entists,

I am currently completing my discussion section for my final year project. Can anyone give any ideas as why results can be insignificant

>> No.4663281

Come now, give us more information than that.

What's your discipline/what kind of measures were you using? What kind of variability did you observe relative to the range of your data? What were your sample sizes?

>> No.4663294

>>4663281
Brain fart. Sorry

I am studying Psychology.
For my project I was looking at the effects of chewing gum on an immediate word recall task. I tested 3 groups in a within participants design with 20 participants in each of the groups. The groups are: control, chewed gum while testing, chewed gum prior to testing. I found that the task was increasingly difficult when compared to previous studies on the same subject matter

>> No.4663307

mean number of words remembered for each group is
control: 3.95
while: 3.90
prior: 4.0

t-test showed that control X while control X prior prior X while were all insignificant.

>> No.4663316

>>4663294
What kind of tests did you do, one-way ANOVA? Have you tried pairwise t-tests? All of this can be done in microsoft excel or a statistical programming language in under 10 minutes.

Also, what do you mean by "increasingly difficult?" Was every group performing just as bad as one another? You could say that the difficulty of your task kept your subjects on the floor (i.e., most of your data points have the lowest possible measurement on whatever dimension you're measuring). If all your measures were on the floor, it'd be very difficult to observe mean differences or differences in variability between groups without enormous sample sizes.

I expect second authorship, btw.

>> No.4663325
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4663325

test was a one way anova.
did t-test for the pairs

i found little to no variability in the scores

>> No.4663326

Dump the data in a csv in a pastebin plz?

>> No.4663336

http://pastebin.com/5HzFs40i

done