Our study crossed manipulated and measured diet-consciousness
and found evidence for the partitioning paradox: consumption of more
from multiple small packages than a single large package when dietconsciousness
was manipulated (replicating DPZ's result) and measured(replicating SNMM's result) (see Table 1). However, the effect of measured
diet-consciousness on the partitioning paradox effect was more
equivocal as in SNMM.We note that the measure of diet-consciousness
(Herman & Polivy, 1980) had low reliability, and we further note that
an interaction of measured andmanipulated diet-consciousness suggests
that the manipulation overrides lower-measured diet-consciousness to
some extent.
Combining our study with previously published studies in a metaanalysis,
we show that among the diet-conscious, partitioning leads to
higher consumption than unpartitioned portions. Importantly, among
those that are not diet-conscious, partitioning has an approximately
equally strong effect in the opposite direction, that is a single portion
leads to higher consumption than partitioned portions.
The partitioning paradox offers an effect that is both theoretically
interesting and practically important. Fruitful opportunities exist in a
number of directions. Measured diet-consciousness representing
the effect of a chronic or individual trait deserves further attention,
and effort should be given to fine-tuning the measure of dietconsciousness.
More effort could be directed towardswhy the effect exists
and to determining the boundary conditions that limit the operation
of the partitioning paradox
Our study crossed manipulated and measured diet-consciousnessand found evidence for the partitioning paradox: consumption of morefrom multiple small packages than a single large package when dietconsciousnesswas manipulated (replicating DPZ's result) and measured(replicating SNMM's result) (see Table 1). However, the effect of measureddiet-consciousness on the partitioning paradox effect was moreequivocal as in SNMM.We note that the measure of diet-consciousness(Herman & Polivy, 1980) had low reliability, and we further note thatan interaction of measured andmanipulated diet-consciousness suggeststhat the manipulation overrides lower-measured diet-consciousness tosome extent.Combining our study with previously published studies in a metaanalysis,we show that among the diet-conscious, partitioning leads tohigher consumption than unpartitioned portions. Importantly, amongthose that are not diet-conscious, partitioning has an approximatelyequally strong effect in the opposite direction, that is a single portionleads to higher consumption than partitioned portions.The partitioning paradox offers an effect that is both theoreticallyinteresting and practically important. Fruitful opportunities exist in anumber of directions. Measured diet-consciousness representingthe effect of a chronic or individual trait deserves further attention,and effort should be given to fine-tuning the measure of dietconsciousness.More effort could be directed towardswhy the effect exists
and to determining the boundary conditions that limit the operation
of the partitioning paradox
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