Object Substitution Masking: When Does Mask Preview Work?
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| Title: | Object Substitution Masking: When Does Mask Preview Work? |
|---|---|
| Language: | English |
| Authors: | Lim, Stephen Wee Hun, Chua, Fook K. |
| Source: | Journal of Experimental Psychology: Human Perception and Performance. Oct 2008 34(5):1108-1115. |
| Availability: | American Psychological Association. Journals Department, 750 First Street NE, Washington, DC 20002-4242. Tel: 800-374-2721; Tel: 202-336-5510; Fax: 202-336-5502; e-mail: order@apa.org; Web site: http://www.apa.org/publications |
| Peer Reviewed: | Y |
| Physical Description: | |
| Page Count: | 8 |
| Publication Date: | 2008 |
| Document Type: | Journal Articles Reports - Evaluative |
| Descriptors: | Experimental Psychology, Visual Perception, Stimulation, Visual Stimuli, Motion |
| ISSN: | 0096-1523 |
| Abstract: | When a target is enclosed by a 4-dot mask that persists after the target disappears, target identification is worse than it is when the mask terminates with the target. This masking effect is attributed to object substitution masking (OSM). Previewing the mask, however, attenuates OSM. This study investigated specific conditions under which mask preview was, or was not, effective in attenuating masking. In Experiment 1, the interstimulus interval (ISI) between previewed mask offset and target presentation was manipulated. The basic preview effect was replicated; neither ISI nor preview duration influenced target identification performance. In Experiment 2, mask configurations were manipulated. When the mask configuration at preview matched that at target presentation, the preview effect was replicated. New evidence of ineffective mask preview was found: When the two configurations did not match, performance declined. Yet, when the ISI between previewed mask offset and target presentation was removed such that the mask underwent apparent motion, preview was effective despite the configuration mismatch. An interpretation based on object representations provides an excellent account of these data. |
| Abstractor: | As Provided |
| Entry Date: | 2009 |
| Access URL: | https://psycnet.apa.org/journals/xhp/34/5/1108/ |
| Accession Number: | EJ823688 |
| Database: | ERIC |
| Abstract: | When a target is enclosed by a 4-dot mask that persists after the target disappears, target identification is worse than it is when the mask terminates with the target. This masking effect is attributed to object substitution masking (OSM). Previewing the mask, however, attenuates OSM. This study investigated specific conditions under which mask preview was, or was not, effective in attenuating masking. In Experiment 1, the interstimulus interval (ISI) between previewed mask offset and target presentation was manipulated. The basic preview effect was replicated; neither ISI nor preview duration influenced target identification performance. In Experiment 2, mask configurations were manipulated. When the mask configuration at preview matched that at target presentation, the preview effect was replicated. New evidence of ineffective mask preview was found: When the two configurations did not match, performance declined. Yet, when the ISI between previewed mask offset and target presentation was removed such that the mask underwent apparent motion, preview was effective despite the configuration mismatch. An interpretation based on object representations provides an excellent account of these data. |
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| ISSN: | 0096-1523 |
