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Theses, dissertations and research publications (including journal articles, conference abstracts and books) from Lund University are collected in this database. Where possible, the option to download a full text document is available. It is also possible to search for Lund University student theses in the student theses database.
| Title | Time- and Space-Order Effects in Timed Discrimination of Brightness and Size of Paired Visual Stimuli |
| Author/s | Geoffrey Patching, Mats Englund, Åke Hellström |
| Department/s |
Department of Psychology
|
| Full-text | Full text is not available in this archive |
| Alternative location (URL) | http://dx.doi.org/10.1037/a002... |
| Publication/Series | Journal of Experimental Psychology: Human Perception and Performance |
| Publishing year | 2012 |
| Volume | 38 |
| Issue | 4 |
| Pages | 915 - 940 |
| Document type | Journal article |
| Status | published |
| Quality controlled | yes |
| Language | English |
| Publisher | American Psychological Association |
| Abstract English | Despite the importance of both response probability and response time for testing models of choice there is a dearth of chronometric studies examining systematic asymmetries that occur over time- and space-orders in the method of paired comparisons. In this study, systematic asymmetries in discriminating the magnitude of paired visual stimuli are examined by way of log-odds ratios of binary responses as well as by signed response speed. Hierarchical Bayesian modeling is used to map response probabilities and response speed onto constituent psychological process, and processing capacity is also assessed using response time distribution hazard functions. The findings include characteristic order effects that change systematically in magnitude and direction with changes in the magnitude and separation of the stimuli. After Hellström (1979, 2000), Sensation Weighting (SW) model analyses show that such order effects are reflected in the weighted accumulation of noisy information about the difference between stimulus values over time, and interindividual differences in weightings asymmetries are related to the relative processing capacity of participants. An account of sensation weighting based on the use of reference level information and maximization of signal-to-noise ratios is posited, which finds support from theoretically driven analyses of behavioral data. |
| Subject |
Science General |
| Keywords | space-order effects, Time-order effects, adaptive perception, wave theory, diffusion model, processing capacity. |
| ISBN/ISSN/Other |
ISSN: 0096-1523 |
| Funder |
Swedish Research Council |
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