Summation and discrimination of gratings moving in opposite directions
We have measured the amount of summation occurring at threshold between gratings which move in opposite directions. The small amount of summation observed at low spatial and high temporal frequencies is approximately consistent with the action of direction-selective mechanisms, as proposed by Levins...
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| Veröffentlicht in: | Vision research (Oxford) 1980, Vol.20 (4), p.341-347 |
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| container_title | Vision research (Oxford) |
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| creator | Watson, Andrew B. Thompson, Peter G. Murphy, Brian J. Nachmias, Jacob |
| description | We have measured the amount of summation occurring at threshold between gratings which move in opposite directions. The small amount of summation observed at low spatial and high temporal frequencies is approximately consistent with the action of direction-selective mechanisms, as proposed by
Levinson and Sekuler (1975), provided that probability summation between such mechanisms is taken into account. However, at high spatial and low temporal frequencies much more summation is found, an amount approximately consistent with detection by directionally non-selective mechanisms.
We have also measured thresholds for identifying the direction of a moving grating. For those gratings which show little summation, direction of motion is judged correctly at the detection threshold, while for those gratings which show the most summation, the identification threshold is considerably above the detection threshold. |
| doi_str_mv | 10.1016/0042-6989(80)90020-6 |
| format | Article |
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Levinson and Sekuler (1975), provided that probability summation between such mechanisms is taken into account. However, at high spatial and low temporal frequencies much more summation is found, an amount approximately consistent with detection by directionally non-selective mechanisms.
We have also measured thresholds for identifying the direction of a moving grating. For those gratings which show little summation, direction of motion is judged correctly at the detection threshold, while for those gratings which show the most summation, the identification threshold is considerably above the detection threshold.</description><identifier>ISSN: 0042-6989</identifier><identifier>EISSN: 1878-5646</identifier><identifier>DOI: 10.1016/0042-6989(80)90020-6</identifier><identifier>PMID: 7414966</identifier><language>eng</language><publisher>England: Elsevier Ltd</publisher><subject>Form Perception - physiology ; Humans ; Motion Perception - physiology ; Pattern Recognition, Visual - physiology ; Sensory Thresholds - physiology ; Space life sciences ; Time Factors ; Visual Acuity</subject><ispartof>Vision research (Oxford), 1980, Vol.20 (4), p.341-347</ispartof><rights>1980 Pergamon Press Ltd</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c469t-ebc35934435ec33469ec9ca37aca54105a0a3640ac14cdfb35c744d5324050373</citedby><cites>FETCH-LOGICAL-c469t-ebc35934435ec33469ec9ca37aca54105a0a3640ac14cdfb35c744d5324050373</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/0042698980900206$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3537,4010,27900,27901,27902,65306</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/7414966$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Watson, Andrew B.</creatorcontrib><creatorcontrib>Thompson, Peter G.</creatorcontrib><creatorcontrib>Murphy, Brian J.</creatorcontrib><creatorcontrib>Nachmias, Jacob</creatorcontrib><title>Summation and discrimination of gratings moving in opposite directions</title><title>Vision research (Oxford)</title><addtitle>Vision Res</addtitle><description>We have measured the amount of summation occurring at threshold between gratings which move in opposite directions. The small amount of summation observed at low spatial and high temporal frequencies is approximately consistent with the action of direction-selective mechanisms, as proposed by
Levinson and Sekuler (1975), provided that probability summation between such mechanisms is taken into account. However, at high spatial and low temporal frequencies much more summation is found, an amount approximately consistent with detection by directionally non-selective mechanisms.
We have also measured thresholds for identifying the direction of a moving grating. For those gratings which show little summation, direction of motion is judged correctly at the detection threshold, while for those gratings which show the most summation, the identification threshold is considerably above the detection threshold.</description><subject>Form Perception - physiology</subject><subject>Humans</subject><subject>Motion Perception - physiology</subject><subject>Pattern Recognition, Visual - physiology</subject><subject>Sensory Thresholds - physiology</subject><subject>Space life sciences</subject><subject>Time Factors</subject><subject>Visual Acuity</subject><issn>0042-6989</issn><issn>1878-5646</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1980</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNp9kE9LxDAQxYMo67r6DRR6Ej1UJ82fNhdBFleFBQ_qOaRpukS2TU3aBb-9qV326GnCmzczeT-ELjHcYcD8HoBmKReFuCngVgBkkPIjNMdFXqSMU36M5gfLKToL4QsAcpaJGZrlFFPB-Ryt3oemUb11baLaKqls0N42tp0kVycbH5_tJiSN28Wa2Kh2nQu2N9HtjR6N4Ryd1GobzMW-LtDn6ulj-ZKu355fl4_rVFMu-tSUmjBBKCXMaEKiZrTQiuRKK0YxMAWKcApKY6qruiRM55RWjGQUGJCcLND1tLfz7nswoZdN_LHZblVr3BBkjMcIz0Q00smovQvBm1p2MZfyPxKDHPHJkY0c2cgC5B8-yePY1X7_UDamOgztecX-w9Q3MeTOGi-DtqbVZkIhK2f_P_AL_QJ-xQ</recordid><startdate>1980</startdate><enddate>1980</enddate><creator>Watson, Andrew B.</creator><creator>Thompson, Peter G.</creator><creator>Murphy, Brian J.</creator><creator>Nachmias, Jacob</creator><general>Elsevier Ltd</general><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope></search><sort><creationdate>1980</creationdate><title>Summation and discrimination of gratings moving in opposite directions</title><author>Watson, Andrew B. ; Thompson, Peter G. ; Murphy, Brian J. ; Nachmias, Jacob</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c469t-ebc35934435ec33469ec9ca37aca54105a0a3640ac14cdfb35c744d5324050373</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1980</creationdate><topic>Form Perception - physiology</topic><topic>Humans</topic><topic>Motion Perception - physiology</topic><topic>Pattern Recognition, Visual - physiology</topic><topic>Sensory Thresholds - physiology</topic><topic>Space life sciences</topic><topic>Time Factors</topic><topic>Visual Acuity</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Watson, Andrew B.</creatorcontrib><creatorcontrib>Thompson, Peter G.</creatorcontrib><creatorcontrib>Murphy, Brian J.</creatorcontrib><creatorcontrib>Nachmias, Jacob</creatorcontrib><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>Vision research (Oxford)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Watson, Andrew B.</au><au>Thompson, Peter G.</au><au>Murphy, Brian J.</au><au>Nachmias, Jacob</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Summation and discrimination of gratings moving in opposite directions</atitle><jtitle>Vision research (Oxford)</jtitle><addtitle>Vision Res</addtitle><date>1980</date><risdate>1980</risdate><volume>20</volume><issue>4</issue><spage>341</spage><epage>347</epage><pages>341-347</pages><issn>0042-6989</issn><eissn>1878-5646</eissn><abstract>We have measured the amount of summation occurring at threshold between gratings which move in opposite directions. The small amount of summation observed at low spatial and high temporal frequencies is approximately consistent with the action of direction-selective mechanisms, as proposed by
Levinson and Sekuler (1975), provided that probability summation between such mechanisms is taken into account. However, at high spatial and low temporal frequencies much more summation is found, an amount approximately consistent with detection by directionally non-selective mechanisms.
We have also measured thresholds for identifying the direction of a moving grating. For those gratings which show little summation, direction of motion is judged correctly at the detection threshold, while for those gratings which show the most summation, the identification threshold is considerably above the detection threshold.</abstract><cop>England</cop><pub>Elsevier Ltd</pub><pmid>7414966</pmid><doi>10.1016/0042-6989(80)90020-6</doi><tpages>7</tpages><oa>free_for_read</oa></addata></record> |
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| ispartof | Vision research (Oxford), 1980, Vol.20 (4), p.341-347 |
| issn | 0042-6989 1878-5646 |
| language | eng |
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| source | MEDLINE; Elsevier ScienceDirect Journals |
| subjects | Form Perception - physiology Humans Motion Perception - physiology Pattern Recognition, Visual - physiology Sensory Thresholds - physiology Space life sciences Time Factors Visual Acuity |
| title | Summation and discrimination of gratings moving in opposite directions |
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