Questions tagged [statistics]
For questions about statistical methods that might be appropriate for certain paradigms within psychology, psychiatry, neuroscience, or cognitive science.
198
questions
3
votes
1
answer
67
views
Correlation used as explanatory device in ''The neuroscience of Intelligence'
I am currently reading Dr. Richard Haier's book The Neuroscience of Intelligence. I have a base knowledge of statistics, but I am confused about the following extract from page 80 (chapter 2.4):
...
- 33
1
vote
1
answer
28
views
What is the notation about group differences in terms standard deviations?
I am just getting into watching psych lectures and things online and am taking notes but I have been wondering what the proper/standard way of writing in note form about standard deviations is.
For ...
- 11
1
vote
0
answers
41
views
What to call variables that measures human's random preferences to select a given experimental stimuli?
I understand that in some cases, given a set of objects, human subjects asked to randomly select one will tend to favor one over others.
We all know the situation where "37" will be favored when ...
- 11
2
votes
2
answers
86
views
Books on Statistics in R for behavioral data analysis
Are there any statistics books geared towards teaching behavioral data analysis especially in psycholinguistics?
- 21
0
votes
1
answer
80
views
What is the distinction between "relationship" and "difference" in behavioural statistics?
Quoting [emphasis added] from D.C. Howell's (2012) Statistical Methods for Psychology, chapter 9 (Correlation and Regression), Pg 252:
Although you should not make too much of the distinction ...
- 320
1
vote
0
answers
1k
views
Generosity in the World Happiness Score
One factor in the World Happiness Score is generosity. I had trouble to understand what this actually means and how it enters into the score.
These were my specific questions:
Does "generosity&...
2
votes
1
answer
56
views
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 ...
user23149
2
votes
1
answer
46
views
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 ...
- 21
3
votes
2
answers
403
views
correction for multiple comparison over many ROIs
I would like to know how to correct a p value of a stiatistic when the same test was run over multiple regions of interest. The modality is MEG.
So, I have 4 Regions Of Interests, and I ran the same ...
- 31
4
votes
1
answer
663
views
Are the raw scores of the NEO-PI-R normally distributed?
Scoring the NEO-PI-R test results, as done for example in this document, involves converting an absolute score to a t-score. However, the conversion from absolute score to t-score (as can be seen in ...
- 181
1
vote
0
answers
27
views
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 ...
- 227
3
votes
1
answer
460
views
Independence of criterion and d-prime (psychophysics)
I am reading here, page 5 that d' (d-prime) does not vary with criterion (in contrast to hit rate for instance which does vary with criterion, and which can be a biased measure of a subject's ...
user21198
1
vote
2
answers
613
views
Is there actually a correlation between emotional trauma and homosexuality
One of the key talking points I hear to disparage homosexuality is that it stems from "a lack of a strong male figure" or some variation of that, putting aside the obvious irrelevancy of argument. I ...
- 143
1
vote
0
answers
37
views
Averaging a linear or nonlinear function treatment
In a hypothetical PET study, my sample consists of a clinical population which exhibit brain hypermetabolism. I divide my sample into two homogenous groups. One receives a treatment whereas the other ...
- 121
3
votes
2
answers
708
views
Bounds on skew and kurtosis of IQ
The question of whether IQ is Normally distributed, or instead follows e.g. a Pearson type IV distribution, has been debated since at least the 1910s. The quotient- and deviation-based definitions ...
- 201