Friday, December 14, 2018

A bunch of pediatricians swallowed Lego heads. You can use their research to teach the basics of research methods and stats.

As a research-parent-nerd joke before Christmas, six doctors swallowed Lego heads and recorded how long it took to pass the Lego heads. Why? As to inform parents about the lack of danger associated with your kid swallowing a tiny toy.

 I encourage you to use it as a class example because it is short, it describes its research methodology very clearly, used a within subject design, has a couple of means, standard deviations, and even a correlation.

TL;DR:

https://dontforgetthebubbles.com/dont-forget-the-lego/


In greater detail: 

Note the use of a within subject design. They also operationalized their DV via the SHAT (Stool Hardness and Transit) scale.



*Yeah. So here is the Bristol Stool Chart mentioned in the above excerpt. Please don't click on the link if your are eating or have a sensitive stomach.

Research outcomes, including mean and standard deviations:


An example of a non-significant correlation, with the SHAT score on the y-axis and the FART score on the x-axis.:


Here is a link to the original research. And here is a link to the blogger doctors who conducted this experiment.
How to use in class:

1) Is this a sufficient sample size?
2) An example of human biology research that did sample equally from men and women.
3) In-class replication. I double dog dare you.
4) Non-significant correlation.


Friday, December 7, 2018

Naro's "Why can't anyone replicate the scientific studies from those eye-grabbing headlines?"


You can use it in class to introduce the crisis and solutions. I particularly enjoy the overall tone: Hope is not lost. This is a time of change in statistics and methodology that will ultimately make science better. A few highlights:


*History of science, including the very first research journal (and why the pressure to get published has lead to bad science)


*Illustration of some statsy ways to bend the truth in science




 *References big moments in the Replication Crisis


 *Discusses the crisis AND solutions (PLOS, SIPS, COS)