  It has been realized that the measurement problem of quantum mechanics is
essentially the determinate-experience problem, and in order to solve the
problem, the physical state representing the measurement result is required to
be also the physical state on which the mental state of an observer supervenes.
This necessitates a systematic analysis of the forms of psychophysical
connection in the solutions to the measurement problem. In this paper, I
propose a new, mentalistic formulation of the measurement problem which lays
more stress on psychophysical connection. By this new formulation, it can be
seen more clearly that the three main solutions to the measurement problem,
namely Everett's theory, Bohm's theory and collapse theories, correspond to
three different forms of psychophysical connection. I then analyze these forms
of psychophysical connection. It is argued that the forms of psychophysical
connection required by Everett's and Bohm's theories have potential problems,
while an analysis of how the mental state of an observer supervenes on her wave
function may help solve the structured tails problem of collapse theories.
