Psychology and Neuroscience Stack Exchange
Psychology and Neuroscience Stack Exchange

Questions tagged [statistics]

For questions about statistical methods that might be appropriate for certain paradigms within psychology, psychiatry, neuroscience, or cognitive science.

For questions about statistical methods that might be appropriate for certain paradigms within psychology, psychiatry, neuroscience, or cognitive science

For a list of brief publications, see this site

For a general overview, see Statistics.

198 questions
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In a forced-choice task, what proportion of responses is above chance level?

If I give a task in which there are only two response-options, and I want to categorise the participant according to their responses, what is the 'cutoff' or required proportion of one type of response? E.g. 50-50 would be chance level performance:…
LennaKB
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in R : How to check RT's for ex-gaussian fit with the fitdistrplus package

I have several response times from participants in a mental rotation task. I'm really puzzled how to get the best distribution model to fit my data. I had checked several ones with the fitdistrplus::fitdist function and have two good candidates…
Frédéric
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How do scientists/psychologists deal with conflicting experiment results?

I'm currently writing a paper and one of the points is about how overprotective parenting can cause anxiety in children. The results seem pretty clear cut in favour of the assertion (1). https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5007197/ However,…
Jim stoke
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Cortical Statistics

I just began reading Dayan & Abbott's Theoretical Neuroscience. I'm barely even through the second page, and I'm already stuck on this paragraph: Axons from single neurons can traverse large fractions of the brain, or, in some cases, the entire…
shinvu
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If a two-tailed test shows significance and the mean is higher, can you infer that one condition is significantly higher?

Condition A has M=5, SD=1 Condition B has M=10, SD=1 If a two-tailed test gives p<.05, can you infer that Condition B was significantly higher than Condition A without conducting a one-tailed test?
user23149
2
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1 answer

Do .sav files expire after the trial version expires?

I saved a certain file on an SPSS software that expires after 2 weeks of its installation. I wanted to ask if my file would still exist even after the expiration date. The data is for psychology research.
W. Bruce
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How to efficiently use a statistical consultant?

I a fairly solid grasp of Statistics and have taught statistics to both undergraduate and graduate Psychology students. There are, however, sizable gaps in my knowledge and I have attempted to employ a statistical consultant a couple of times. The…
StrongBad
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How valid are comparisons of prevalence without control group, using different studies?

Let's say we have a subgroup S of the population (e.g. inmates), and we do a prevalence study for a certain condition D (e.g. major depression) in S for which we try to diagnose D somehow. But we don't have a control group consisting of the general…
viuser
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Other approach to factorisation

I am not sure if this is the ideal forum to ask so if someone can point me to another place that would be good. In a lot of psychology research traditional explanatory factory analysis always seems the way to go in order to start some initial…
MaskofIllusion
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Does putting something on a scale of left-to-right bias people in one direction?

I'd like to know what research has found about whether talking about politics on a scale of left to right biases people in any way. Perhaps to answer questions such as if the scale were to be inverted, would it have any difference?
Jodes
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How many people have a mental disorder in the world at the same time?

According to this article, Mental disorders affect one in four people One in four people in the world will be affected by mental or neurological disorders at some point in their lives But this statistics doesnt tell us how many people is having…
Pablo
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Calculating statistical significance in behaviour change

I have run a study on a group of 158 individuals to see if a teaching intervention can change their perceptions of scientists. Before the intervention, all the children in the study were asked to choose 6 words to describe a scientist. This data…
llewmihs
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In SPSS, should you change the significance level for One way ANOVA post-hocs?

When running a one-way ANOVA, selecting "Post-hoc" and ticking "Bonferroni": There is a box at the bottom which says "significance level" and the default is 0.05. My question is: should I leave the default value (assuming SPSS adjusts accordingly)…
LennaKB
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Talk for lay audience: determining private traits and attributes from online behaviour

This question was referred from Cross-Validated Stack Exchange: I need to give a talk on statistic / machine learning as applied to determining an individual's traits and attributes from online behaviour and its use in targeted advertising. For this…
Max
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How do you interpret the MSe and partial eta squared reported with an F-statistic?

In my area of psychology we report the results of a repeated measures ANOVA with 1 within subjects independent variable as follows: F(2,60) = 120.29, MSe = 173.09, p<0.05, ηp2 = 0.78 I understand this results means that the main effect of the…
PsychStudent88
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