Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/18846
Title: Concurrent progressive-ratio and fixed-ratio schedule performance under geometric and arithmetic progressions by brushtail possums
Contributor(s): Cameron, Kristie E (author); Clarke, Katrina H (author); Bizo, Lewis  (author); Starkey, Nicola J (author)
Publication Date: 2016
DOI: 10.1016/j.beproc.2016.03.015
Handle Link: https://hdl.handle.net/1959.11/18846
Abstract: The aim of this study was to compare the demand for food under concurrent progressive- and fixed-ratio schedules. Twelve brushtail possums participated in 16 conditions where schedule, progression and food type were varied. An incrementing schedule increased the fixed-ratio requirement within and across sessions and was arranged as either a geometric sequence (base 2), or an arithmetic sequence (step 5). Two foods were tested: a flaked barley and coco-pop® mix versus rolled oats. Overall, performance was similar for most possums in the within- and across-session incrementing schedules. An analysis of the estimates of essential value and break point produced the same account of demand for foods under the geometric or arithmetic progressions and within- and across-session procedures for 8 of 12 possums. Six possums showed higher demand for rolled oats compared to flaked barley, and two possums showed higher demand for flaked barley compared to rolled oats. Incrementing ratios within, rather than between sessions using an arithmetic progression was demonstrated to be a time efficient procedure for investigating demand for different food types without affecting conclusions about the relative demand for those foods.
Publication Type: Journal Article
Source of Publication: Behavioural Processes, v.126, p. 94-100
Publisher: Elsevier BV
Place of Publication: Netherlands
ISSN: 1872-8308
0376-6357
Fields of Research (FoR) 2008: 170202 Decision Making
170199 Psychology not elsewhere classified
060801 Animal Behaviour
Fields of Research (FoR) 2020: 520402 Decision making
310901 Animal behaviour
Socio-Economic Objective (SEO) 2008: 970117 Expanding Knowledge in Psychology and Cognitive Sciences
839901 Animal Welfare
Socio-Economic Objective (SEO) 2020: 280121 Expanding knowledge in psychology
109902 Animal welfare
Peer Reviewed: Yes
HERDC Category Description: C1 Refereed Article in a Scholarly Journal
Appears in Collections:Journal Article

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