Attachment Ambiguity II
The preference bias for low attachment in the parse tree is formalized by (Hindle and Rooth, 1993)
The model asks the following questions:
Vap: Is there a PP headed by p and following the verb v which attaches to v (Vap=1) or not (Vap=0)?
Nap: Is there a PP headed by p and following the noun n which attaches to n (Nap=1) or not (Nap=0)?
We compute P(Attach(p)=n|v,n)=P(Nap=1|n) and P(Attach(p)=v|v,n)=P(Vap=1|v) P(Nap=0|n).