Econstudentlog

Stuff

i. Click to view full size:

(link). He probably is going to say something stupid. According to a new paper: The Mere Anticipation of an Interaction with a Woman Can Impair Men’s Cognitive Performance. ‘Further studies needed’ etc., but I’m inclined to believe that they are right and that yes, males are actually that stupid and impressionable. Though effect sizes are important to have in mind too.

ii. I thought this was funny. Then again I’m weird.

iii. I’ve added Guam to my list of ‘places I don’t want to visit anytime in the near future’. Why? Because of this.

“Birds are dominant apex predators in terrestrial systems around the world, yet all studies on their role as predators have come from small-scale experiments; the top-down impact of bird loss on their arthropod prey has yet to be examined at a landscape scale. Here, we use a unique natural experiment, the extirpation of insectivorous birds from nearly all forests on the island of Guam by the invasive brown tree snake, to produce the first assessment of the impacts of bird loss on their prey. We focused on spiders because experimental studies showed a consistent top-down effect of birds on spiders. We conducted spider web surveys in native forest on Guam and three nearby islands with healthy bird populations. Spider web densities on the island of Guam were 40 times greater than densities on islands with birds during the wet season, and 2.3 times greater during the dry season. These results confirm the general trend from manipulative experiments conducted in other systems however, the effect size was much greater in this natural experiment than in most manipulative experiments. […]

We compared the abundance of web-building spiders on Guam to that on Rota, Tinian and Saipan. At each site, we set up 1–3 transects, separated by at least 200 meters. The transects were 20 or 30 meters long, depending on the year. We counted all visible webs within 1 horizontal meter of each transect centerline and up to 2 vertical meters above the ground. Webs lacking a spider were considered abandoned, and not counted. […] Guam, without birds, had a mean of 18.37 spider webs per ten meters in the wet season, compared to 0.45 webs per ten meters on nearby islands with birds […]. In the dry season, Guam had 26.19 spider webs per ten meters compared to 11.37 webs per ten meters on nearby islands with birds”

iv. You Don’t Know Me, But I Know You: The Illusion of Asymmetric Insight, by Pronin, Kruger, Savitsky and Ross. Interesting. The abstract:

“People, it is hypothesized, show an asymmetry in assessing their own interpersonal and intrapersonal knowledge relative to that of their peers. Six studies suggested that people perceive their knowledge of their peers to surpass their peers’ knowledge of them. Several of the studies explored sources of this perceived asymmetry, especially the conviction that while observable behaviors (e.g., interpersonal revelations or idiosyncratic word completions) are more revealing of others than self, private thoughts and feelings are more revealing of self than others. Study 2 also found that college roommates believe they know themselves better than their peers know themselves. Study 6 showed that group members display a similar bias—they believe their groups know and understand relevant out-groups better than vice versa. The relevance of such illusions of asymmetric insight for interpersonal interaction and our understanding of “naive realism” is discussed.”

v. Crunching the data on human brain evolution. Which functional form fits the underlying process better is an interesting discussion but I’d like to note that what I first thought when seeing these (or rather, similar depictions elsewhere) was: ‘hey, look at that standard deviation!’

vi. Social rejection shares somatosensory representations with physical pain. Another fMRI-study. I don’t know enough about this stuff to comment on the validity of the conclusions, but I’ll probably bookmark it and keep it for later so that I’ll be able to use it to justify my decision not to ask out the hypothetical cute girl in class next semester (or whatever).

vii. Quality of Diabetes Care in Italy. I’m glad I don’t live in Italy:

“Of 126,163 diabetic individuals (prevalence of diabetes 5.8%, mean age 71 years), as many as 42% did not have their HbA1c measured for over a year. Even considering only insulin-treated people, this frequency remains disappointingly high (35%). The proportion of people having at least two annual tests for HbA1c was low (32.7%; 43.1% among insulin-treated patients). […] Another disappointing finding is the very low proportion of subjects in whom microalbuminuria was tested (27%) in spite of its role as a strong predictor of cardiovascular diseases and dialysis. Annual testing for plasma total cholesterol (61.2%), creatinine (58.9%), eye examination (11.1%), electrocardiogram (25.1%), and arterial echo-Doppler (15.9%) were low.”

I recently posted some corresponding Danish numbers here, though unfortunately that post is in Danish. In Denmark approximately 95% of diabetics get their HbA1c measured at least once a year. I get my HbA1c tested 3-4 times a year and I’d have no clue what to do without these numbers. 92% of Danish patients cared for by the hospital outpatient clinics (diabetesambulatorier) and 55% of the patients treated by their local GP were tested for microalbuminuria at least once every two years. I’m tested once per year. I frankly found it shocking that the Italic HbA1c numbers were that low but I probably should have known better, given the variation in diabetes care across countries. Not all of the variables mentioned are equally important but Italy fails at the really basic stuff too. For a Danish diabetic to move to a place like (Southern) Italy (I’m almost certain the situation is far worse in the south than in the north) would be a bit like an old and frail person moving to a place where they haven’t heard about penicillin. This stuff is a big part of why I’m not very likely to move away from Denmark when I finish my education – a lot of places I basically consider ‘off limits’ because I’d be gambling with my health by moving there, and even a lot of relatively advanced societies still have diabetes treatment protocols which belong in the (metaphorical) Stone Age.

September 18, 2012 - Posted by | archaeology, diabetes, medicine, papers, Psychology, random stuff, studies

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