Robert Valeris

As an academic writing coach, here are the 9 mistakes I see PhD and grad students make when writing scientific papers. A thread. 🧵 #PhDchat #ECRchat

Over the last hundred years, statisticians have uncovered a whole universe of statistical distributions and relationships between them.

Our recent article was featured on aidsmap.com. Great collaboration with @robertvaleris, Anna Stadelman, Sarah Cusick, and Sandra Safo. aidsmap.com/news/apr-2021/…

@_MiguelHernan I find it very interesting that Joaquín Villalba was affiliated to the Medical School and the Veterinary School...

Fun facts about #epidemiology: 1/ In modern times, the first mention of "Epidemiology" happened in #Madrid in 1803. By physician Joaquín Villalba in his book "Epidemiología Española": books.google.es/books?id=EvsBb… "Epidemiología" was then translated into English as "Epidemiology".

@Wjrgo @lisalendway Actually, that is analytical specificity (there is also analytical sensitivity), which is different from diagnostic specificity. The former deals with the capacity of a test to discriminate between analytes, the latter is proportion of true negative individuals classified as such

@lisalendway The other day I heard a virus expert say on tv that specificity of a covid test is about its ability to distinguish covid from the flu. Since then the term makes sense to me.

Any other statisticians have to look up sensitivity and specificity every time? I can never remember which is which. I much prefer true positive rate and true negative rate.

@taylorev_ @AcademicChatter A good dose of sleep, you need to be focused and alert. You will be awesome!

It’s the day before your qualify exam. What do you do? #phdlife @AcademicChatter

@Dagmar__Gross @katewbauer @ProfMattFox This resonates a lot with me... They both seemed to me like the two sides of a coin, but this explanation is cristal clear. Thanks

@katewbauer @ProfMattFox Use positive language for each. Inclusion are the broader strokes, the "must haves" eg adult age, require surgery. If the subject must *not have* something, that's exclusion. Eg could say for inclusion "must not be pregnant". Easier to say exclusion: pregnancy. Clear?

What is the difference between inclusion and exclusion criteria. My take is inclusion are the people who are eligible to be in the study that you want to include. Exclusions are eligible and you want in your study, but have to be excluded for some reason (e.g missing data).

@jenspdx @thewbert You are welcome. I really like that book. In R, I would recommend spatstat package... the help document is quite thorough. cran.r-project.org/web/packages/s…

@jenspdx @thewbert

@VivianHLyons @JerzyEisenGuyot You are right, you would have to write it from scratch. I worked on g-formula for a course on methods for causal inference, but I used R and wrote the programs myself (not in the most efficient way though hehe). I am checking the SAS macro and it is quite impressive.

@robertvaleris @JerzyEisenGuyot I was hoping to use a developed package for the g-formula, and didn't know of one for stata.

Hey #epitwitter! I'm trying to use the G-formula SAS Macro from Harvard's causal inference group and am running into some coding trouble. Does anyone have experience with this software and the time/patience to help? #nativeSTATAuserhere

@VivianHLyons @JerzyEisenGuyot Vivian, if you don’t mind my asking: why switch to SAS (or R) and not use STATA????

@JerzyEisenGuyot I'd love to chat! Thank you!! Happy to switch to R, I just got started (and stuck) in SAS and felt the need to just muscle through

@EGranger90 @jamiecsergeant Congrats on your paper, specially your writing style

Here's a #tweetorial of my first paper😁 This is work I did with @jamiecsergeant and Mark Lunt, comparing different approaches to combining multiple imputation and propensity scores. Hopefully relevant for some of you on #EpiTwitter and #StatsTwitter 👇👇👇

@ManoliFM @bertaocana @Barb_Vera @Rakvazdob @estefaniacsor @manueljesusF Muy cierto, y por más que revises y revises siempre se escabulle alguno...

@bertaocana @robertvaleris @Barb_Vera @Rakvazdob @estefaniacsor @manueljesusF Otra gran cosa que tiene compartir, más ojos ven los errores que a veces se nos escapan!! 😜😜

@bertaocana @Barb_Vera @Rakvazdob @estefaniacsor @ManoliFM @manueljesusF Me alegra que sea de utilidad. Saludos

@Barb_Vera @bertaocana @Rakvazdob @estefaniacsor @ManoliFM @manueljesusF La número 9 tiene un error, la forma correcta es: Juan les escribía cartas a sus primas, ya que el pronombre “les” esta vinculado a “sus primas”.

@bertaocana @Rakvazdob @estefaniacsor @ManoliFM @manueljesusF ¿Podrías explicarme cómo lo usas en tus clases? Me parece una idea interesante :)

TODAY'S (very relevant) INFOGRAPHIC

The Ten Commandments of Logic

As long as you can see one beautiful thing, there is reason to live, as life is beauty :-)) #PSMyWords

@PhilosophyNow it is true that #Philosophy of #Science will not make a scientist out of thin air, but its insights run deep.

You create the universe