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• W2578312483 abstract "New methods, derived from animal work, for measuring food reward value (i.e. reinforcing value of food), and motivation (i.e. strength of desire) to consume, in humans are described and validated. A sipping device (sipometer) was developed that permits access to a liquid food or beverage on two reward schedules: continuous reinforcement (CR) and progressively increasing time spent exerting pressure on a straw (PR-schedule). In addition, a pictorial scale showing a cup, from which the ‘amount wanted’ could be marked was used to pre-test potential consumption. Intake, time spent sipping, breakpoint, and pressure exerted were the main dependent variables measured. Three pilot experiments were conducted. In Experiment 1, participants (n = 8) consumed yogurt shakes after a 1-h or 21-h food deprivation period on both schedules. In Experiment 2, participants (n = 8) sham-consumed (i.e. spit out) sweet and non-sweet beverages, utilizing both schedules. In Experiment 3, sham-consuming sweet and non-sweet beverages on both schedules and working for shake on the PR schedule were repeated, after three nights of either habitual sleep or short sleep duration (n = 7) in a crossover design. In Experiment 1, participants sipped longer after 21-h vs. 1-h of food deprivation (13 ± 3.0 vs. 8.0 ± 2.1 s; p = 0.04), on the PR schedule. In Experiment 2, sham-intake (p = 0.01) and sipping time (p = 0.04) were greater for sweet than non-sweet beverages on the PR schedule and a similar, though not conventionally significant, effect was observed for exerted pressure (p = 0.09). In both Experiment 2 and Experiment 3 after habitual sleep, on the PR schedule, cumulative pressure difference between sweet and non-sweet beverage increased with difference in amount wanted in the taste test. In contrast, after short sleep participants were less willing to work for sweet taste as their wanting increased, suggesting that sleep deprivation raises desire, but lowers behavioral output. Taken together these results demonstrate that the sipometer and associated ratings are reliable and useful measures of motivation to consume and reward value in humans. Participants were more motivated to obtain access to sweet beverages, especially when these were better liked than to obtain access to non-sweet beverages." @default.
• W2578312483 created "2017-01-26" @default.
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• W2578312483 date "2017-03-01" @default.
• W2578312483 modified "2023-10-01" @default.
• W2578312483 title "A sipometer for measuring motivation to consume and reward value of foods and beverages in humans: Description and proof of principle" @default.
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• W2578312483 doi "https://doi.org/10.1016/j.physbeh.2017.01.023" @default.
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