Experimental Design: Variables, Groups, and Controls

Biology Professor (Twitter: @DrWhitneyHolden) describes the fundamentals of experimental design, including the control group and experimental group, the independent, dependent, and controlled variables, and the importance of using at least three replicates in your sample size.
Want a PDF of the final white board with all the answers written in? Download FREE STUDY NOTES here: tinyurl.com/BiologyProfessorN...

[@denisserumi2061]

Why can't everyone teach like this! THANK YOU! You make learning accessible, thank you.

[@talicalewanavanua8803]

Thank you, Professor. Your explanations are clear, and I now understand the concept.

[@Ureyeuh]

You knocked this topic out of the part so concisely and quickly. Excellent job.

[@abdulbarikhan1026]

An expert in the field, a great way of teaching such a complex and technical research

[@CostantinoYHaule]

thanks Dr Whitney, i was confused about experimental research design but though your explanations now am clearly understanding the concept.

[@AsmaaPurity]

You re excellent!!
I ve been struggling to undertand this
You made it so simple I am aazed
Why don't teachers teach in this wonderful way!
Thank you

[@douglasheinl250]

After 2 other video explanations, yours was the one that helped me understand the concepts. Thank you!!!

[@BiologyProfessor]

Thanks! :)

[@bellaswan1099]

Precise yet very useful !
Exactly what I was looking for...
Thanks a bunch.☺

[@denisesunshinehodgson1676]

The concepts in your video are so clear, thank you!

[@centerforanimalecology268]

Superb explanation, with accurate example

[@jasondias5817]

You are a great teacher! I could never understand this concept. Now I can!

[@greetings378]

Thank you so much, I recommend this because this video makes me more understanding than what my teacher says.

[@tgagaming1354]

Okeh

[@hadeerrashad5486]

You’re excellent! Thank u so much for making this amazing video!.

[@OlaOverflow]

Thank you! About to start my research for a business-related degree, and this simple explanation has helped clarify a lot 😊

[@DamonMacready]

An excellent explanation! Thanks!

[@SaeedMobayed]

Thank you for your amazing teaching

[@nadibatchi]

Thank you so much, i was struggling with this topic in my biology class, and I found your video and I was able to get my info correct except for the controlled groups

[@leighz.5401]

I'm actually studying experimental psychology, but this is the closest available vid on youtube, i hope it translates well

[@jozefgajdos717]

Great video. Thank you very much.

[@jaylee842]

Thank you so much. Great lecture, again.

[@leonardwijaya5683]

Thank you Prof. Really nice explanation

[@DL-bl2ce]

Excellent video!

[@ashleybryant8083]

Ashley Bryant GOL 106 V1. I learned that scientific research must be studied using a control group, a baseline, to compare against a study group, a group that has exactly on variable that is different than the circumstances of the control group and is then compared against the control group to accurately determine what the effect of the given variable is.

[@Dr.NicoleBenoit-Roy]

Great video! Thanks

[@bezayitmeles197]

sound quality could be improved, but you're a natural at this, so keep it up
very informative

[@BiologyProfessor]

Thanks! This is an older video and I have better microphones now.

[@adoge9732]

THIS IS SO HELPFUL for my sixth grade science class

[@Bluehometrader]

Thank you for your clear explanation

[@adamnelson9128]

For some research, it's beneficial to have multiple characteristics that differ the experimental group from the control group. In my area of research, we're currently exploring the effect gene mutations have on the efficiency of protein activity. Because of the nature of epigenetics and how various genetic loci can regulate gene expression, it's essential to test how various combinations of multiple amino acid mutations affect protein translation and activity. And then comparing the different mutation combinations against one another to identify possible links between genetic loci based on observing a significant difference in protein activity. In this case, the control serves as a way to verify that the proteins were naturally translated and could function at a standard degree of efficiency in the particular cellular environment of the study.

[@justsomeguy4319]

Thanks so much help with my daughters homework

[@Robert_henderson]

Loved the explanation thanks

[@ceveo357]

thanks so much very helpful

[@lindaherrera9392]

I wish my professor explained it this way!!!!!

[@CristalMediumBlue]

This is exactly what I needed. Thanks!

[@BiologyProfessor]

Glad it helped!

[@anybasicinformation807]

so thanks mam

[@lvteachme973]

Thank you!!!

[@kingvmpp]

wow! I had a sci lab and this was so HELPFUL!

[@kingvmpp]

Thanks!

[@BiologyProfessor]

You’re welcome!

[@talinedanny]

thank you

[@Guigaenfer2008]

Nice!

[@guesswho1793]

Magnificent 👏👏👏👏

[@varmony1239]

perfectthank you so much

[@bhuvaneashbalan5305]

Dr. Whitney can u make videos based in psychological experiments

[@dr.mohamedabuelghait9156]

thank you very much but i didn't get the video of scientific method of you

[@mweetwamulongo1425]

how do you perform a Design of experiment using different levels of different parameters.

[@BiologyProfessor]

I’m sorry, I need more information to understand what you are asking.

[@margaretweir424]

im so happy my teacher toght me dis

[@BiologyProfessor]

It’s a very important topic that is often glossed over

[@ReddDevil1982]

Question. "The controlled variables don't affect result." I thought the result is den dependent variable? If yes, then the controlled variables have an affect on the result?

[@bigberther7368]

The controlled variables are not ment to affect the result. They keep the experimental environment and surroundings the exact same to increase accuracy.

[@stephensteve6455]

Thanks!
I got it

[@BiologyProfessor]

Great! 😄

[@ZianasFoodArchive]

Hi I m a new research scholar..I have decided to conduct an experiment with 1 control group n 2 treatment groups..Shall I take a total of 30 samples for all the 3 groups together?

[@BiologyProfessor]

To determine adequate sample size, you can do a test called a power analysis. A statistician can help with this. Otherwise, you are guessing. 30 samples total (10 per group) may be acceptable, but it’s definitely on the low end and may not be a large enough sample size. If you can reasonably do 20 or 30 per group, that’s probably better. But it’s hard to know without more information and a power analysis.

[@ZianasFoodArchive]

@@BiologyProfessor Thanks a lot for the reply..

[@eskindertigabu2837]

Thanks

[@BiologyProfessor]

You are welcome 🤗

[@nazda2007]

Thank you, you video saves my dissertation

[@khaledali3663]

Thank you Dr. Whiteny I really Like your explanation , l have very advance questions about groups . can i get you email

[@kidanemariammitiku629]

Keep up

[@eldiablo9990]

does anyone told you that u have very beautiful voice, nose and eyelashes

[@lilwock9189]

Does she have patreon???

[@BiologyProfessor]

I am afraid not. ;)

[@whatswrongwithme4381]

I still don't understand!! HELP ME, MY HOMEWORK IS DUE IN 14 AND A HALF HOURS

[@Heat_Hoops_Basketball_League]

Why does everyone look like bots

[@rei2sheisty]

Idk man

[@athishchristopher4863]

fr

[@lisayuu]

[@TheAverageServant]

How to teach ADHD people 😆

[@cryojayy]

why she breathing so loud