Off-campus UMass Amherst users: To download campus access theses, please use the following link to log into our proxy server with your UMass Amherst user name and password.

Non-UMass Amherst users: Please talk to your librarian about requesting this thesis through interlibrary loan.

Theses that have an embargo placed on them will not be available to anyone until the embargo expires.

Access Type

Open Access

Degree Program


Degree Name

Thesis (M.S.)

Year Degree Awarded



Decision making, Schizophrenics, Hallucinations and illusions


The process of making judgments and formulating convictions is a vital function performed by all human beings. Successful accomplishment of such tasks usually involves the integration of interoceptive cues (i.e. past experience, feeling states, etc.) with exteroceptive, or objective, information. Often, personal idiosyncracies determine the relative amount of flexibility with which convictions or opinions are held, regardless of contradictory information.