Stephen Black writes:
>Mitt Romney claimed to be present at and remember a public
>parade in Detroit which took place nine months before he was
>born. OK, unless it was a fetal memory, a very early one.
>http://snipurl.com/22dos24
Whether it was a false memory or "just more political BS" as sugges
Pressure to publish or perish, perhaps?
Nancy Melucci
Long Beach City College
Long Beach CA
-Original Message-
From: Michael Palij
To: Teaching in the Psychological Sciences (TIPS)
Cc: Michael Palij
Sent: Mon, Feb 27, 2012 5:44 pm
Subject: [tips] Don't You Hate Research That...
Not really
Sometimes 'what everyone knows' just ain't so.
Or is your tongue in cheek?
On Feb 27, 2012, at 7:44 PM, Michael Palij wrote:
> just provides results that everyone already knows? As one example,
> see:
> http://newscenter.berkeley.edu/2012/02/27/greed/
>
> And the abstract to the
just provides results that everyone already knows? As one example,
see:
http://newscenter.berkeley.edu/2012/02/27/greed/
And the abstract to the original research article is here:
http://www.pnas.org/gca?allch=&submit=Go&gca=pnas%3B1118373109v1
One wonders why people even bother to do this kind
On Mon, 27 Feb 2012 08:31:02 -0800, Marie Helweg-Larsen wroteL
>I have a simple statistical question.
>
>I have a sample of 307 people. 111 are in the red group and 196 are the
>blue group.
>
>The correlation between variables x and y in the red group is r= .226 (n=111),
>p <.05 and in the blue gr
OK, I think the mystery of Marie's data is solved. I was on the right track
inititially. If you look at non-Smokers, notice the Y axis where ALL the data
is above 2, going up to 5, and there is a slight positive correlation. Now take
the smoker data and visually superimpose it or sketch it in.
Hi
In general, patterns that hold within groups need NOT hold between groups
(problem of ecological correlations), which can also produce seeming paradoxes
for within versus aggregate correlations, as in Marie's case.
Note, for example, in the means that were posted, there is a strong negative
OOPS .. didn't see the scatterplot , just notice it, let me look
==
John W. Kulig, Ph.D.
Professor of Psychology
Coordinator, University Honors
Plymouth State University
Plymouth NH 03264
==
- Original Message -
From: "Arlie Belliv
One possibility (which is easily checked by examining the scatterplot of all
data with the two groups visually coded) is this. In a scatterplot of all the
data, lets say group 1's data shows a positive correlation, but most of the
points are in the upper left quadrant. Group 2's data, which als
Hi Marie,
Have you calculated your effect sizes? It could be that the positive
correlations of .23 and .16 are so small that, when the groups are
combined, the error (or noise) turns them into negative correlations. At a
glance, the scatter plots don't looks as though the relationships between
var
Marie said: Now what doesn't make sense to me that two groups individually
have positive and significant correlations but the two groups combined can have
a negative and significant correlation.
Here is an example I used when teaching Methods to students in a Criminal
Justice program. Imagine t
Doesn't look like there are outlier issues. Both X and Y are measured on 5
point scales. Here are the means and standard deviations:
Descriptive Statisticsa
Mean
Std. Deviation
N
Var X
2.9469
.84347
113
Var Y
3.0952
.70281
112
a. Red Group
Descriptive Statisticsa
Mean
Std. De
Rather than create an attachment, I'm providing a link to a handout for my
stats class. It portrays how one could have a positive relationship in one
group and a negative relationship in another group, but overall there would be
a positive relationship. If you simply imagine the upper group (x v
Any outliers when the full set is combined? That has the possibility of
changing the direction of the relationship.
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Dr. Lou Manza
Professor and Chair of Ps
I have a simple statistical question.
I have a sample of 307 people. 111 are in the red group and 196 are the blue
group.
The correlation between variables x and y in the red group is r= .226 (n=111),
p <.05 and in the blue group r=.164 (n=196), p<.05. However, when I run the
correlation betwee
A false memory, or just more political BS?
On Feb 27, 2012, at 9:05 AM,
wrote:
> A good classroom example (a nod to the relevancy issue):
>
> Mitt Romney claimed to be present at and remember a public parade in
> Detroit which took place nine months before he was born. OK, unless
> it was a
A good classroom example (a nod to the relevancy issue):
Mitt Romney claimed to be present at and remember a public parade in
Detroit which took place nine months before he was born. OK, unless
it was a fetal memory, a very early one.
http://snipurl.com/22dos24
I note with modest pride that it
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