Effect size calculation in a systematic review / Cálculo del tamaño del efecto en una revisión sistemática

This video shows how to calculate the efect size when performing a systematic review or meta-analysis:

http://www.youtube.com/watch?v=nkcZFAmmKeE

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Este vídeo muestra cómo calcular el tamaño del efecto cuando se está llevando a cabo una revisión sistemática o un meta-analisis:

http://www.youtube.com/watch?v=nkcZFAmmKeE

Learn how to count/ Aprender a contar

If you are interested in teaching Maths to the very tender, have a look at this links:

How to count from 1 to 10 (I have used it myself to fix my ideas). It has categories of games according to its recommended age:
http://www.topmarks.co.uk/maths-games/3-5-years/counting

Another interesting place to go:
http://www.guardian.co.uk/education/mathematics

And yet another:
http://mathtrain.tv/

Evolution: booklet of instructions / Evolución: librito de instrucciones

A collection of short films on Evolution is available from THe Howard Hughes Medical Institute through this link:

http://www.hhmi.org/biointeractive/shortfilms/

There is also a link to a biointeractive laoratory, very useful for educational purposes (click on the VIRTUAL STICKLEBACK EVOLUTION LAB):
http://www.hhmi.org/biointeractive/

Educational activities to teach about DNA are available here:
http://www.dnai.org/teacherguide/guide.html

Would you like to stop smoking? No? You don´t mind at all? I don´t believe you. Anyway, watch this BBC docummetary on smoking, etiher if you love cigarettes or if you have made up your mind about quitting:

http://www.youtube.com/watch?v=gZvrf1N5j4M

By the way, if you didn´t know, tobacco is the main cause of preventable death.

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¿Le gustaría dejar de fumar? ¿No? ¿No le importa en absoluto? No me lo creo. De todas maneras vea usted este documental de la BBC sobre el tabaco, tanto si adora los cigarrillos como si ha tomado la determinación de dejarlo.

http://www.youtube.com/watch?v=gZvrf1N5j4M

Por cierto, en caso de que no lo sepa, el tabaco es la causa de muerte prevenible más importante.

History of Maths / Historia de las matemáticas

I have come across many interestig books, links and videos on the History of Maths. For an non mathematician, this is an interesting way to look furhter into Maths, and hopefully, learn a bit more of it.

This is a video by Terry Jones (a former Monty Python) with an hilarious look into the development of Maths:

Vídeo by Terry Jones, part 1

Video by Terry Jones, part 2

And then, you have the more serious tone in the Marcus du Sautoy doccumentary:
The Language of the Universe, part 1


This is another BBC doccumentary (1986) on the development of Calculus:
http://www.youtube.com/watch?v=ObPg3ki9GOI

Pranav Mistry, inventor

Please have a look at this 15 minute TED video in which Pranav Mistry, a graduate from IIT (Indian Institute of Technology) at Mumbai, and MIT, shares his amazing innovations in the field of interface between humans and computers. A peep into the future.

http://www.youtube.com/watch?v=ZqV3mpok22w



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Echen una mirada a este vídeo de TED de 15 minutos de duración en el que Pranav Mistry, un licenciado del IIT (Indian Institute of Technology) de Bombay, y el MIT, comparte asombrosas innovaciones en el campo de la interconexión entre humanos y ordenadores. Un vistazo al futuro.

http://www.youtube.com/watch?v=ZqV3mpok22w

Random or fixed effects?/ Efectos fijos o efectos aleatorios?

One of the decisions to be taken when performing a systematic review is whether to choose a random or fixed effects model. Very briefly, a fixed effects model is chosen if the studies in the metaanalisys are homogeneous, and random effects model is preferred otherwise. This video illustrates the question:

http://www.youtube.com/watch?v=laviboNorXk

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Una de las decisiones que hay que tomar cuando se lleva a cabo una revisión sistemática es si se debe escoger un modelo de efectos fijos o de efectos aleatorios. De manera muy resumida, se escogen efectos fijos si los estudios incluidos en el metaanálisis son homogéneos, y efectos aleatorios en caso contrario. Este vídeo ilustra la cuestión.

http://www.youtube.com/watch?v=laviboNorXk