HAHAHAHAHAHAHA
No
This is not randomisation
pic.twitter.com/zyYDNkb0dz
Epidemiologist. Writer (Guardian, Observer etc). "Well known research trouble-maker". PhDing at @UoW Host of @senscipod Email gidmk.healthnerd@gmail.com he/him
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
Add this Tweet to your website by copying the code below. Learn more
Add this video to your website by copying the code below. Learn more
By embedding Twitter content in your website or app, you are agreeing to the Twitter Developer Agreement and Developer Policy.
| Country | Code | For customers of |
|---|---|---|
| United States | 40404 | (any) |
| Canada | 21212 | (any) |
| United Kingdom | 86444 | Vodafone, Orange, 3, O2 |
| Brazil | 40404 | Nextel, TIM |
| Haiti | 40404 | Digicel, Voila |
| Ireland | 51210 | Vodafone, O2 |
| India | 53000 | Bharti Airtel, Videocon, Reliance |
| Indonesia | 89887 | AXIS, 3, Telkomsel, Indosat, XL Axiata |
| Italy | 4880804 | Wind |
| 3424486444 | Vodafone | |
| » See SMS short codes for other countries | ||
This timeline is where you’ll spend most of your time, getting instant updates about what matters to you.
Hover over the profile pic and click the Following button to unfollow any account.
When you see a Tweet you love, tap the heart — it lets the person who wrote it know you shared the love.
The fastest way to share someone else’s Tweet with your followers is with a Retweet. Tap the icon to send it instantly.
Add your thoughts about any Tweet with a Reply. Find a topic you’re passionate about, and jump right in.
Get instant insight into what people are talking about now.
Follow more accounts to get instant updates about topics you care about.
See the latest conversations about any topic instantly.
Catch up instantly on the best stories happening as they unfold.
Ok, I'll bite. 1) If you are recruiting on the spot, it's sometimes convenient to also randomize on the spot. Yes, you can certainly weigh randomization by # of people already enrolled in each arm, but you can run into even bigger problems that way, particularly with small n's.
2) Different # of people in each arm is a problem for statistical efficiency (i.e. uncertainty), but not really for the sorts of biases you're looking to avoid in an RCT, so maybe not such a big deal. 3) The problem here isn't so much the randomization procedure as it is small n.
I mean, statistically I guess you could justify it. The main problem is that, as described, the procedure has so many potential methods of bias that it's almost impossible for allocation concealment to have been successful
Cards get bent, participants can see who's chosen which before and where they get allocated, the research assistant is unblinded (could influence selection), shuffling is non-random and easily manipulable etc
Bent cards and other things that just change the relative weighting of the randomization isn't a big deal, as above. That impacts efficiency, but not bias. Non-blinding is frequently necessary and may not even be desired in all cases.
I don't have the rest of that paper, so no idea if the latter is reasonable, but the RCTs that I've done and been involved with have effectively no blinding very much intentionally.
Study is here: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2597887/ …
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.