Psychometric consultant: providing strategic and technical advice for certification and testing programs.
Joined November 2012
- Tweets 273
- Following 126
- Followers 63
- Likes 788
34 Photos and videos
10 Jul 2022
Check our new paper! Examining Human and Automated Ratings of Elementary Students’ Writing Quality: A Multivariate Generalizability Theory Application - Dandan Chen, Michael Hebert, Joshua Wilson, 2022 journals.sagepub.com/eprint/…
13 Jun 2022
Last week, we presented our workshop, Data Dashboard 101: Excel User Guide, at the @AEAamp @aeaweb Summer Institute! It's great to share our data analytics experience with the community. What makes it even better is that our audience really enjoyed the workshop! #DataAnalytics
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Dandan Chen, Ph.D. retweeted
6 May 2022
Please help retweet and share again🤗: We are recruiting MORE participants to join our Asian American Educator Resilience Study to understand the longitudinal impact of Anti-Asian Racism/Violence on educators' wellbeing and resilience. Link to participate: berkeley.qualtrics.com/jfe/f…
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Dandan Chen, Ph.D. retweeted
4 Dec 2021
Today is launch day!🚀🚀
I am super excited to introduce *Tidy Data Tutor* a web application for visualizing your #rstats #tidyverse data analysis pipelines: tidydatatutor.com/
(Developed with Philip Guo)
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Dandan Chen, Ph.D. retweeted
3 Nov 2021
New book "Statistics and Data Science for Teachers" presents statistical ideas through investigations and engagement with the statistical problem-solving process. FREE to download! statisticsteacher.org/2021/1… #statisticseducation #statsed #teachers #statisticsteacher #datascience
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Dandan Chen, Ph.D. retweeted
#DYK we have 600 physician volunteers who help to support our assessments and programs? We appreciate all our volunteers for their dedication to advancing the highest standards of the specialty. #NationalVolunteerWeek #Anethesiologists
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Dandan Chen, Ph.D. retweeted
15 Apr 2020
New dplyr - 7 things to know:
1) Built in tidyselect
2) relocate()
3) Superpowered summarise()
4) colwise using across()
5) new rowwise() grammar
6) easy modeling inside dataframes
7) nest_by()
towardsdatascience.com/what-… #rstats #tidyverse #datascience #r4ds
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Dandan Chen, Ph.D. retweeted
17 Mar 2020
And now these three remain: faith, hope and love. But the greatest of these is love.
1 Corinthians 13:13
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Dandan Chen, Ph.D. retweeted
17 Mar 2020
I'm not good with the old school Asian model minority stigma where we won't speak up or stand up for ourselves. In times like now, we truly truly need to stay united. Lets fight this virus TOGETHER!! Wash your hands, practice social distancing, take this seriously, stay safe ❤️
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Dandan Chen, Ph.D. retweeted
17 Mar 2020
And I dont wanna hear about no German measles/Spanish flu bc everyday Asian-Americans inc ppl I know are threatened and physically attacked. I dont give a crap about the history of names rn. What I do know is this subtle anti-Chinese message only empowers more hate towards asians
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Dandan Chen, Ph.D. retweeted
17 Mar 2020
🤦🏻♂️I wish you would powerfully support the vulnerable people that will suffer due to our mismanagement of this virus, including those that will be affected by the racism you’re empowering
16 Mar 2020
The United States will be powerfully supporting those industries, like Airlines and others, that are particularly affected by the Chinese Virus. We will be stronger than ever before!
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Dandan Chen, Ph.D. retweeted
17 Mar 2020
Can you honestly tell me there is ZERO anti-Chinese sentiment in all his characterizations of the virus? Can you honestly tell me Asians aren't being unfairly physically attacked today in the US? Is it that hard to use coronavirus or COVID-19? We playin the blame game in a crisis
17 Mar 2020
Every major media outlet called it Wuhan virus before trump
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Dandan Chen, Ph.D. retweeted
11 Mar 2020
I’m no epidemiologist, but I am a #dataviz specialist, so here are some thoughts on coronavirus and log scales:
1) In the initial outbreak phase, a virus like this spreads exponentially not arithmetically, i.e a log scale is the natural way to track the spread
11 Mar 2020
NEW on coronavirus: many western countries may soon face Italy’s situation
Case numbers since outbreaks began in several countries have tracked a ~33% daily rise. This is as true for UK, France, Germany as Italy; the latter is simply further down the path ft.com/content/a26fbf7e-48f8…
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Dandan Chen, Ph.D. retweeted
26 Feb 2020
♻️ Fluent in Excel but new to R? This is gold…
"R for Excel Users: Pivot Tables, VLOOKUPs in R" 👨💻 @mdancho84
buff.ly/2TffQII via @bizScienc #rstats
ALT R for Excel Users: New Features in tidyquant v 1.0.0
ALT Excel Pivot Table is now in R
ALT Excel VLOOKUP() now in R
ALT 100 Excel-based statistical, date/date-time, and financial math functions have been ported to R. The things I’m most excited about are Business Calendar calculations:
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Dandan Chen, Ph.D. retweeted
Our research shows that #anesthesiology residency graduates’ written certification exam performance after we introduced the staged exam system resulted in improved pass rates. Explore our findings published in @IARS_Journals: bit.ly/331RV2o
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5 Dec 2019
Thank you Justin Hurwitz for spending 37 minutes with me this year on @Spotify. You are my #1. #spotifywrapped open.spotify.com/wrapped/936…
Dandan Chen, Ph.D. retweeted
8 Oct 2019
The first five chapters of mastering-shiny.org are basically complete — this should be a great place to start if you've ever wanted to learn Shiny, and I'd love your feedback about what is confusing and what questions your still have #rstats
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