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Archive for the ‘fabio’ Category

socinfo 2014

If you are in Spain, you might enjoy attending the SocInfo 2014 conference which will be held at the Yahoo Headquarters in Barcelona. The goal is to bring together people at the edge of computer science and social science. Click here for the program and details on papers.

50+ chapters of grad skool advice goodness: Grad Skool Rulz/From Black Power

Written by fabiorojas

November 5, 2014 at 12:01 am

Posted in fabio, mere empirics

waves of internet commerce

Each wave of Internet commerce “solves” a particular social issues related to computing:

  • 1980s: PC computing – how to get everyone a machine
  • 1990s: The email/Internet revolution – how to get everyone hooked up into the system
  • 1990s (late): The Amazon/Ebay/PayPal eruption – how to solve the issue of exchanging physical goods using the Internet
  • 1990s (late): The indexing revolution – how to help people quickly find information.
  • 2000s: Social networking – how to build systems of tailor made communication
  • 2000s (mid): Mobile devices – how to make computing mobile

So what is the 2010s about? My guess is that we’re in the middle of Internet as commodity monetizer. AirBnB turns extra rooms into lodging, Uber turns cars into transport for hire, and so forth. Interesting observation: Apple and Google are the only firms to successfully participate in two waves.

Add your comments below.

50+ chapters of grad skool advice goodness: Grad Skool Rulz/From Black Power 

Written by fabiorojas

November 3, 2014 at 12:22 am

Posted in fabio, mere empirics

norwegian vocal jazz (can teppo hook us with the finns?)

Sidsel Endresen & Bugge Wesseltoft. From The OrgEkologist.

50+ chapters of grad skool advice goodness: Grad Skool Rulz/From Black Power

Written by fabiorojas

November 2, 2014 at 12:01 am

Posted in fabio

john danaher explains why he blogs

I often wonder: why should someone blog? Philosopher John Danaher explains that it helps him:

2. It helps to generate writing flow states: I appreciate that the term “flow” state is something of a buzzword. Still, it has a basis in psychological science and it is something that blogging can help generate. The psychological barriers to writing a blog post are much lower than the psychological barriers to writing an article for peer review. Yet, when writing the former you can get into a flow state that can then be leveraged into writing the latter. Many is the time that I have finished writing a blog post and jumped straight into writing a more serious article.

Agree. Writing a blog post is like a warm up. The whole post is worth reading. The rest of the blog is fascinating as well.

50+ chapters of grad skool advice goodness: Grad Skool Rulz/From Black Power 

Written by fabiorojas

November 1, 2014 at 12:05 am

medieval combat

From Laughing Squid.

50+ chapters of grad skool advice goodness: Grad Skool Rulz/From Black Power 

Written by fabiorojas

October 31, 2014 at 12:03 am

letters of recommendation: still garbage

Long time readers know that I am a skeptic when it comes to letters of recommendation. The last time I wrote about the topic, I relied on a well cited 1993 article by Aamodt, Bryan amd Whitcomb in Public Personnel Management that reviews the literature and shows that LoR’s have very little validity. I.e., they are poor predictors of future job performance. But what if the literature has changed in the meanwhile? Maybe these earlier studies were flawed, or based on limited samples, or better research methods provide more compelling answers. So I went back and read some more recent research on the validity of LoRs. The answer? With a few exceptions, still garbage.

For example, the journal Academic Medicine published a 2014 article that analyzed LoR for three cohorts of students at a medical school. From the abstract:

Results: Four hundred thirty-seven LORs were included. Of 76 LOR characteristics, 7 were associated with graduation status (P ≤ .05), and 3 remained significant in the regression model. Being rated as “the best” among peers and having an employer or supervisor as the LOR author were associated with induction into AOA, whereas having nonpositive comments was associated with bottom of the class students.

Conclusions: LORs have limited value to admission committees, as very few LOR characteristics predict how students perform during medical school.

Translation: Almost all information in letters is useless, except the occasional negative comment (which academics strive not to say). The other exception is explicit comparison with other candidates, which is not a standard feature of many (or most?) letters in academia.

Ok, maybe this finding is limited to med students. What about other contexts? Once again, LoRs do poorly unless you torture specific data out of them. From a 2014 meta-analysis of LoR recommendation research in education from the International Journal of Selection and Assessment:

… Second, letters of recommendation are not very reliable. Research suggests that the interrater reliability of letters of recommendation is only about .40 (Baxter, et al., 1981; Mosel & Goheen, 1952, 1959; Rim, 1976). Aamodt, Bryan & Whitcomb (1993) summarized this issue pointedly when they noted, ‘The reliability problem is so severe that Baxter et al. (1981) found that there is more agreement between two recommendations written by the same person for two different applicants than there is between two people writing recommendations for the same person’ (Aamodt et al., 1993, p. 82). Third, letter readers tend to favor letters written by people they know (Nicklin & Roch, 2009), despite any evidence that this leads to superior judgments.

Despite this troubling evidence, the letter of recommendation is not only frequently used; it is consistently evaluated as being nearly as important as test scores and prior grades (Bonifazi, Crespy, & Reiker, 1997; Hines, 1986). There is a clear and gross imbalance between the importance placed on letters and the research that has actually documented their efficacy. The scope of this problem is considerable when we consider that there is a very large literature, including a number of reviews and meta-analyses on standardized tests and no such research on letters. Put another way, if letters were a new psychological test they would not come close to meeting minimum professional criteria (i.e., Standards) for use in decision making (AERA, APA, & NCME, 1999). This study is a step toward addressing this need by evaluating what is known, identifying key gaps, and providing recommendations for use and research. [Note: bolded by me.]

As with other studies, there is a small amount of information in LoRs. The authors note that “… letters do appear to provide incremental information about degree attainment, a difficult and heavily motivationally determined outcome.” That’s something, I guess, for a tool that would fail standard tests of validity.

50+ chapters of grad skool advice goodness: Grad Skool Rulz/From Black Power 

Written by fabiorojas

October 29, 2014 at 12:01 am

dear steven fazzari

Hi, Steve, Fabio here. I recently read about how you are now the chair of the new sociology department at Washington University, St. Louis. It seems that you are getting advice from some excellent sociologists. Still, I wanted to offer a suggestion about how to build your program that I think has some merit  but that may not be obvious.

Here it is: build a program that, roughly speaking, is about 2/3 quantitative and 1/3 qualitative. However, don’t use the traditional criteria for “quantitative research,” which means anyone who does regression analysis or, as in economics, people who do research in theoretical statistics. Instead, the quantitative sector of the department should focus on unique and important quantitative types of data that sociologists are, or can be, good at. Roughly speaking, that means network analysis, social simulations, “big data,” and quantitative analysis of text. You might also toss in the experimenter or survey design guru.

Why? No one else is building such a program, but it would have a huge immediate impact on the profession of sociology. You would have an enormous first mover advantage. It also has other  benefits. For example, the graduate students would be immediately employable inside and outside academia; the faculty would be able to do some fundraising, though not as much as a demography center; and this sort of critical mass would increase the chance that WUSTL would be the origin of the next big quantitative advance in the social sciences.

The other 1/3 of the program should be filled with mid to late career qualitative scholars. You need this for a few reasons. First, sociology, especially the younger folks, has converged on the view that mixed methods is the way to go. So you will need top notch ethnographers, historical types, and interviewers to make sure that your PhD graduates have a proper view of sociology. Also, graduate students may opt for a qualitative PhD and you will need good faculty to make sure they don’t get lost in the cracks. The most important reason is that older scholars will be able to maintain a distinct identity and forge bonds in a program that is, by design, tilted in one direction.

As a well regarded private school, you might be tempted to mimic your peers and chase the “best people,” which means whoever recently graduated from high status programs with good publications. It’s not a bad idea, but you will directly compete with all the other top 2o programs that claims these graduates. Instead, you might consider a more focused mission that has a very specific, and achievable, intellectual goal. It’s worth a thought.

50+ chapters of grad skool advice goodness: Grad Skool Rulz/From Black Power 

Written by fabiorojas

October 28, 2014 at 12:01 am

Posted in academia, fabio, sociology

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