Bonjour,
Je ne suis pas sur d’avoir compris ta problématique mais je te propose le bout de code ci-dessous.
\title{test}
\matrix{nstep= reply1}
\nextstep{\nstep}
\real{b=2}
\real{c=3}
\real{d=4}
\real{rep=}
\statement{
a=\embed{reply1,4}
\if{\step==2 and \rep<=0.5}{b=\embed{reply2,4}
}
\if{\step==2 and \rep>0.5}{c=\embed{reply3,4}
d=\embed{reply4,4}
}}
\real{rep=\reply1}
\answer{}{\a}{type=numeric}
\answer{}{\b}{type=numeric}
\answer{}{\c}{type=numeric}
\answer{}{\d}{type=numeric}
\text{nstep=}
\text{nstep=(\step=2 and \rep<=0.5)? reply2}
\text{nstep=(\step=2 and \rep>0.5)? reply3,reply4}