Evaluation of stimuli along a hierarchy under additive and geometric progressive-ratio schedules
type: CreativeWork
description: This study was primarily intended as a comparative investigation of the difference between participants' responses to a task under two progressive-ratio schedules (i.e., geometric and additive). Furthermore, the study served as an examination of the variations in response levels across an array of preferences (HP, MP, LP) under the two increasing schedule requirements. Three individuals, all males, ranging between the ages of 16 years old and 28 years old participated in the study. The study utilized a MSWO preference assessment to identify the stimuli for each participant. The three identified stimuli were categorically ranked as HP, MP, and LP to be analyzed during three independent reinforcer assessments. An alternating treatment design was conducted to assess the stimuli. The additive and geometric progressive ratio schedules were conducted in a single-operant arrangement for each reinforcer assessment. The dependent variables collected during the reinforcer assessment were: (a) the breakpoint, (b) responses per minute, and (c) the cumulative number of responses. The data were further analyzed using mean breakpoint, average response per minute, total tasks correct, cumulative number of tasks completed, and sessions terminated. The results of the study support the suggestion of Glover et al. (2008): namely, that individuals with ASD may vary their response levels across a hierarchy of stimuli under increasing schedule requirements. The results for two of three participants are consistent with the research on reinforcer assessments under progressive ratio schedules. The results derived from 2/3 participants’ assessments support the notion that HP stimuli yields a higher mean BP compared to either the MP and LP reinforcer (DeLeon et al., 2009; Call et al., 2012; Glover et al., 2008). In addition, the MP stimuli supported higher mean break points than the LP stimuli for 2/3 participants (see also Call et al., 2012). The findings for one participant are consistent wi…
abstract: This study was primarily intended as a comparative investigation of the difference between participants' responses to a task under two progressive-ratio schedules (i.e., geometric and additive). Furthermore, the study served as an examination of the variations in response levels across an array of preferences (HP, MP, LP) under the two increasing schedule requirements. Three individuals, all males, ranging between the ages of 16 years old and 28 years old participated in the study. The study utilized a MSWO preference assessment to identify the stimuli for each participant. The three identified stimuli were categorically ranked as HP, MP, and LP to be analyzed during three independent reinforcer assessments. An alternating treatment design was conducted to assess the stimuli. The additive and geometric progressive ratio schedules were conducted in a single-operant arrangement for each reinforcer assessment. The dependent variables collected during the reinforcer assessment were: (a) the breakpoint, (b) responses per minute, and (c) the cumulative number of responses. The data were further analyzed using mean breakpoint, average response per minute, total tasks correct, cumulative number of tasks completed, and sessions terminated. The results of the study support the suggestion of Glover et al. (2008): namely, that individuals with ASD may vary their response levels across a hierarchy of stimuli under increasing schedule requirements. The results for two of three participants are consistent with the research on reinforcer assessments under progressive ratio schedules. The results derived from 2/3 participants’ assessments support the notion that HP stimuli yields a higher mean BP compared to either the MP and LP reinforcer (DeLeon et al., 2009; Call et al., 2012; Glover et al., 2008). In addition, the MP stimuli supported higher mean break points than the LP stimuli for 2/3 participants (see also Call et al., 2012). The findings for one participant are consistent wi…
author: Amini, Meaghan Latifi
language: en
keywords: Autism, Progressive-ratio schedule, Vocational skill, Additive schedule, Geometric schedule, High preferred, Moderate preferred, Low preferred, MSWO
date published: 2019-02-12
date modified: 2026-07-24T05:01:20Z
provider: University of Texas
publisher: Networked Digital Library of Theses and Dissertations
type: WebPage
source organization: The University of Texas at Austin

PropertyValue
property ID: Handle
value: https://hdl.handle.net/2152/74376

PropertyValue
property ID: DOI
value: 10.26153/tsw/1496