Frequently in the literature on Hecke algebras for the symmetric group and their generalisations, one encounters references to Young's seminormal form and Young's orthogonal form. I have a good understanding of the seminormal form, which gives simple formulae for the actions of simple transpositions on Specht modules for which the matrices are "nearly triangular".

What I don't understand is how the orthogonal form is different. Are these just two names for the same thing?