Journal Article23 March 2026 Anthony Lucas, A.K. Singh
Modified pay tables from a licensed reel slot machine were altered to examine
whether two games with equal variance and par could produce meaningful
differences in the duration of play, at the level of the individual gambler. To
the best of our knowledge, this was the first study to examine this possibility.
Industry executives consider time on device (TOD) to be a critical measure of
gaming value, especially for losing players. Additionally, TOD experiences are
theorized to produce knock-on effects related to loyalty behaviors. The results
of 18 simulations featuring six different player engagement protocols supported
the ability of differences in the allocation of pay table variance to
significantly impact the spins per losing player. These outcomes indicated that
games with the same par and total variance should not be assumed to produce the
same expected TOD. For operators, the findings suggest that more
meaningful/precise pay table descriptors could help them populate slot floors
with games that are more likely to produce their desired TOD outcomes. For game
makers, the results present opportunities to supply games that improve the
outcome targeting of individual player experiences. For decades, par has been
the primary focus of pay table metrics and gaming value. But par is a long-term
measure of central tendency, with multiple studies indicating that differences
in pars do not generate significantly different session-level results. This
study, along with several others, indicates the considerable ability of variance
to impact the player’s visit-level outcome.