What is internal validity?

An introduction to internal validity and how it relates to critical appraisal of research studies.
This video was developed with the help of a University of Sydney Educational Innovation Grant.

[@vivianwen3409]

Thanks for making this video! Out uni prof showed your clip in class!

[@festivetoe9492]

I really wish you kept making videos. These are the best I have come across for my research unit and I can honestly say you may have saved me for my exam (hopefully!)

[@SoCalDanny]

Same

[@simobenaissa3541]

DID HE ?

[@breacooper3116]

thank you soo much i don't know why these things have to be so complicated thank you for breaking to down for us

[@angelbunny6383]

Thank you for your simple, yet informative explanation. It helped me so much!

[@hannahnelson4569]

The story in this video brings up concerns

[@postingproductions1050]

Lol

[@sangirengngo9084]

hahha

[@monicavidaurri6119]

Thank you! I was having trouble understanding it. Great video.

[@danielledegregorio6886]

Thanks for making this! I was struggling with this and your video helped a lot :)

[@brighttooth3592]

Thank you

[@Wowo89101]

Your videos are soooo well made!!! im surprised you only have these few videos because this was very helpful

[@albankuhn922]

Thank you so much for this explanation!

[@panchitoborja]

Extraordinary video!!

[@Zrey5678]

Most people explain invalid Internal Validity example. Are there a valid example of Internal Validity.

[@sabinkc5516]

If a physician is measuring a phosphorus level and a dermatologist is doing skin biopsy for melanoma..and the result is stastistically significant...does this stidy has limitation to internal validity?

[@aaronkoh4567]

Hi, could I ask if forced choice questions (whether A is better or B is better) would affect internal validity (since the participant might not be able to choose other options which he feels more inclined to)

[@TU-ff3zu]

make the music loader so we listen to music instead of the description

[@vaibhavanandsharma88]

I love your videos. Love from INDIA.

[@lemonfresh1135]

my name chef

[@baakkhan]

very well described

[@itamchi9084]

Im still confused

[@JayeVoyaging]

thx for the explanation which is clear enough but i don't think the example is ethical

[@vivianrfjblaw]

WUOTAAA

[@karitasazyda4802]

The music is so distracting.. i failed to listen

[@liftyshifty]

awful music

[@privateprivate8530]

invalid.