Disposition-ascriptions are claims such as ‘the glass is fragile’, ‘you are irascible’, ‘that substance is poisonous’, and so on. ‘Fragile’, ‘irascible’ and ‘poisonous’ seem to tell us something about how the object is disposed to behave in certain circumstances. For instance, a fragile glass is disposed to break, an irascible person is disposed to get angry, and a poisonous substance is disposed to kill.
The full podcast of Simona's paper is here: http://www.bppa-online.org/sites/bppa-online.org/files/symposium/Aimar.mp3
A pdf version of Simona's paper is here: http://www.bppa-online.org/sites/bppa-online.org/files/symposium/Aimar.pdf
See the comments for Professor Barbara Vetter's response