What is Item Response Theory? by Nick Shryane

[@andrewmiller6049]

Brilliant summary. So many thanks

[@ez4u2beme]

Be advised the equation that you presented for the 1PL and 2PL models, Y = a*theta - b, is not accurate. The correct model distributes the discrimination parameter across the deviate, i.e., Y = a(theta - b). The logit now become a*theta + c, where c = -a*b. Notwithstanding the aforementioned, I thought it was a good presentation.

[@ho_zzang2]

도밤님 재미있어요

[@f9w99]

What Statistical program do you use to tabulate the data? (Minitab, SPSS, etc) Great presentation by the way. Thanks!

[@zerihunanibo9949]

Really your presentation is good ,thank you!

[@SquigglyBeasst]

Great presentation, thanks for uploading!

[@inasantigana1858]

How to get difficulty value?

[@enapeusman4997]

Good presentation but video too lenty and thus can affect understanding

[@teamncrm3480]

Item response theory

[@heidimacdougall6441]

Wow... British students clap when their professor finishes