The term source monitoring refers to a variety of cognitive processes individuals use to determine whether an experience originated within the self or came from an external source. A belief that auditory hallucinations are real entities independent of the self may be considered an error in source monitoring. The Source Monitoring Framework (SMF) is the most developed and empirically validated model of how ordinary individuals judge whether an event was self-generated or occurred in the outside world. This study of 41 acute inpatients is a first attempt to apply the SMF to autobiographical reports of auditory hallucinations in a clinical setting. Consistent with the SMF, results suggest that similarities between "voices" and real speakers may offer a partial explanation of why patients believe the voices are real. While the SMF provides a useful conceptual background for examining the phenomenology of these voices, the types of source monitoring errors typically encountered in normal individuals do not fully account for this belief as it occurs in psychotic individuals.

Significant improvements in calculational efficiency and capability with the self-consistent electron pairs (SCEP) method has resulted from several new computational developments. A new procedure for constructing the important internal Coulomb and exchange operators has substantially reduced the preiteration time. A general scheme for utilizing molecular symmetry has been used to advantage in reducing the number of pair functions and external operators that must be found explicitly at each iteration. A projection operator tool has been implemented and found to be quite effective at minimizing the number of iterations required at some point on a potential energy surface when an SCEP wavefunction exists for some nearby point. These and other improvements in the program construction have yielded sizable reductions in time for some representative test cases, including water and a potential energy curve for formaldehyde. The new SCEP program also performs low-order perturbation theory treatments and coupled electron pair approximation (CEPA) calculations using the same operator approach. The usefulness of the approach is demonstrated by very large scale calculations on the stability of the two interstellar glycine conformers. These calculations involve the variational treatment of 82,205 symmetry-adapted singly and doubly substituted configurations involving 225 internal electron pairs.

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