In the Western behavioral literature, better product knowledge explains enhanced preference rating (Bilkey and Nes, [1982]).
For example, a high-responding line showed an enhanced preference for amino acids even after only 1 day of deprivation and responded to a fairly low concentration of amino acids.
Notably, exposure to nutrient restriction during perinatal development results in offspring which are hyperphagic and exhibit enhanced preference for high-fat food [11], [12], [13], [14].
Our results are contrary to several studies which find an enhanced preference for masculinity when conception is likely for faces [9], [10], [12] and bodies [13].
This suggests that the reduced schooling behavior in benthic sticklebacks might be driven in part by an enhanced preference for non-social, non-moving shelter options.
In concert with this idea, our results suggest that benthic sticklebacks, which have abundant shelter options in their natural habitat [17], do show an equal or even enhanced preference for non-social shelter stimuli.
Similarly, H9N2 viruses whose HA genes display enhanced preference for α2-6SA binding were transmitted between co-housed ferrets whereas viruses with HAs that bound to α2-3SA were not [12].
In our study, although the appetitive reinforce (1 M sucrose) remained constant on the CS+ for experiments, the presence of quinine on the CS− (distractor) may have enhanced the relative value of the appetitive reinforcer, thus promoting not only avoidance of the distractor, but also enhanced preference of the target CS+.
The results from the LFPQ showed that the dietary condition significantly altered preference for foods according to their taste properties; after the low-protein diet, there was an enhanced preference for the savory foods compared with the sweet foods.
The enhanced preference of AcO migration over the 1,2-C H insertion is attributed to attenuation of the electrophilicity of the gold carbene moiety via the formation of a tris-coordinated gold complex (i.e., P).
