Ratios and effect size
Responding to a related pair of measurements is often expressed as a single discrimination ratio. Authors have used various discrimination ratios; yet, little information exists to guide their choice. A second use of ratios is to correct for the influence of a nuisance variable on the measurement of...
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| Format: | Article |
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American Psychological Association
2017
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| Online Access: | https://eprints.nottingham.ac.uk/42785/ |
| _version_ | 1848796567773904896 |
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| author | Robinson, Jasper |
| author_facet | Robinson, Jasper |
| author_sort | Robinson, Jasper |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | Responding to a related pair of measurements is often expressed as a single discrimination ratio. Authors have used various discrimination ratios; yet, little information exists to guide their choice. A second use of ratios is to correct for the influence of a nuisance variable on the measurement of interest. I examine four discrimination ratios using simulated data sets. Three ratios, of the form a/(a + b), b/(a + b), and (a - b)/(a + b), introduced distortions to their raw data. The fourth ratio, (b - a)/b largely avoided such distortions and was the most sensitive at detecting statistical differences. Effect size statistics were also often improved with a correction ratio. Gustatory sensory preconditioning experiments involved measurement of rats’ sucrose and saline consumption; these flavors served as either a target flavor or a control flavor and were counterbalanced across rats. However, sensory preconditioning was often masked by a bias for sucrose over saline. Sucrose and saline consumption scores were multiplied by the ratio of the overall consumption to the consumption of that flavour alone, which corrected the bias. The general utility of discrimination and correction ratios for data treatment is discussed. |
| first_indexed | 2025-11-14T19:50:02Z |
| format | Article |
| id | nottingham-42785 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T19:50:02Z |
| publishDate | 2017 |
| publisher | American Psychological Association |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-427852020-05-04T19:00:37Z https://eprints.nottingham.ac.uk/42785/ Ratios and effect size Robinson, Jasper Responding to a related pair of measurements is often expressed as a single discrimination ratio. Authors have used various discrimination ratios; yet, little information exists to guide their choice. A second use of ratios is to correct for the influence of a nuisance variable on the measurement of interest. I examine four discrimination ratios using simulated data sets. Three ratios, of the form a/(a + b), b/(a + b), and (a - b)/(a + b), introduced distortions to their raw data. The fourth ratio, (b - a)/b largely avoided such distortions and was the most sensitive at detecting statistical differences. Effect size statistics were also often improved with a correction ratio. Gustatory sensory preconditioning experiments involved measurement of rats’ sucrose and saline consumption; these flavors served as either a target flavor or a control flavor and were counterbalanced across rats. However, sensory preconditioning was often masked by a bias for sucrose over saline. Sucrose and saline consumption scores were multiplied by the ratio of the overall consumption to the consumption of that flavour alone, which corrected the bias. The general utility of discrimination and correction ratios for data treatment is discussed. American Psychological Association 2017-08-14 Article PeerReviewed Robinson, Jasper (2017) Ratios and effect size. Journal of Experimental Psychology . ISSN 0022-1015 effect size discrimination learning discrimination ratio suppression ratio reduction http://psycnet.apa.org/fulltext/2017-34742-001.pdf doi:10.1037/xan0000143 doi:10.1037/xan0000143 |
| spellingShingle | effect size discrimination learning discrimination ratio suppression ratio reduction Robinson, Jasper Ratios and effect size |
| title | Ratios and effect size |
| title_full | Ratios and effect size |
| title_fullStr | Ratios and effect size |
| title_full_unstemmed | Ratios and effect size |
| title_short | Ratios and effect size |
| title_sort | ratios and effect size |
| topic | effect size discrimination learning discrimination ratio suppression ratio reduction |
| url | https://eprints.nottingham.ac.uk/42785/ https://eprints.nottingham.ac.uk/42785/ https://eprints.nottingham.ac.uk/42785/ |