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A recent paper by Hougen \textbf{267} (2011) 23--35.} presents the hypothesis that the relative parities of $\Omega$=1/2 levels in the $3d9$ complex of NiF may need to be reconsidered, since the experimental determinations reported in the literature \textbf{173} (1995) 70--78.} \textbf{214} (2002) 152-174.} \textbf{207} (2001) 66--69.} via $\Omega$-doubling parameters differ by a sign from those obtained from Hougen's theoretical treatment. We report on an experiment that attempts to resolve the discrepancy via laser-induced fluorescence and dispersed fluorescence spectroscopy of NiF created in the molecular-jet laser-ablation apparatus at the University of New Brunswick. New data involving the [22.9]$2\Pi 3/2$--X $2\Pi 3/2$ and [22.9]$2\Pi 3/2$--[0.25] $2\Sigma 1/2$ transitions were obtained, in which several isotopologues of NiF could be resolved and their spectra analyzed. Dispersed fluorescence spectra were obtained by exciting parity-resolved transitions of the [22.9]$2\Pi 3/2$--X $2\Pi 3/2$ spectrum with a narrow-bandwidth cw laser, then observing the fluorescence to the [0.25] $2\Sigma 1/2$ and [1.5] $2\Sigma 1/2+$ states with a grating spectrometer. Changes in the dispersed fluorescence pattern as levels of the same $J\prime$ with different parities were excited will be discussed, and the implications for verifying or refuting Hougen's claim will be presented.