ISPC effect is not observed when the word comes too late: A time course analysis
The item-specific proportion congruency (ISPC) effect is demonstrated by a smaller Stroop effect observed for mostly incongruent items compared to mostly congruent items. Currently, there is a continuing debate on whether conflict driven item-specific control processes or stimulus-response contingen...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2014-12-01
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| Series: | Frontiers in Psychology |
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| Online Access: | http://journal.frontiersin.org/Journal/10.3389/fpsyg.2014.01410/full |
| _version_ | 1828381189361106944 |
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| author | Nart Bedin Atalay Mine eMisirlisoy |
| author_facet | Nart Bedin Atalay Mine eMisirlisoy |
| author_sort | Nart Bedin Atalay |
| collection | DOAJ |
| description | The item-specific proportion congruency (ISPC) effect is demonstrated by a smaller Stroop effect observed for mostly incongruent items compared to mostly congruent items. Currently, there is a continuing debate on whether conflict driven item-specific control processes or stimulus-response contingency learning account for the ISPC effect. In the present study, we conducted two experiments to investigate the time course of the ISPC effect with a stimulus onset asynchrony (SOA) manipulation. Both negative and positive SOAs were used in order to manipulate the contingency learning between the word and the color dimensions. We also combined this SOA manipulation with a set size manipulation (Bugg & Hutchison, 2013) to moderate the contribution of contingency learning and item-specific processes to the observed ISPC effect. We expected that the change in the magnitude of the ISPC effect as a result of SOA would follow different patterns for the 2-item and 4-item set conditions. Results showed that the SOA manipulation influenced the ISPC effect. Specifically, when the word followed the color with a 200 ms delay, the observed ISPC effect was smaller, if at all present, than the ISPC effects in other negative and positive SOA conditions, regardless of set size. In conclusion, our results showed that the ISPC effect was not observed if the word arrived too late. We also conducted additional awareness and RT distribution analyses (delta plots) to further investigate the ISPC effect. These analyses showed that a higher percentage of participants were aware of the ISPC manipulation in the 2-item set condition compared to the 4-item set condition. Delta plots revealed that the ISPC effect was smaller for fastest responses and increased as the responses got slower. |
| first_indexed | 2024-12-10T04:11:10Z |
| format | Article |
| id | doaj.art-0d638ec64d9949d680aa80f07f41f747 |
| institution | Directory Open Access Journal |
| issn | 1664-1078 |
| language | English |
| last_indexed | 2024-12-10T04:11:10Z |
| publishDate | 2014-12-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Psychology |
| spelling | doaj.art-0d638ec64d9949d680aa80f07f41f7472022-12-22T02:02:44ZengFrontiers Media S.A.Frontiers in Psychology1664-10782014-12-01510.3389/fpsyg.2014.01410117233ISPC effect is not observed when the word comes too late: A time course analysisNart Bedin Atalay0Mine eMisirlisoy1TOBB University of Economics and TechnologyMiddle East Technical UniversityThe item-specific proportion congruency (ISPC) effect is demonstrated by a smaller Stroop effect observed for mostly incongruent items compared to mostly congruent items. Currently, there is a continuing debate on whether conflict driven item-specific control processes or stimulus-response contingency learning account for the ISPC effect. In the present study, we conducted two experiments to investigate the time course of the ISPC effect with a stimulus onset asynchrony (SOA) manipulation. Both negative and positive SOAs were used in order to manipulate the contingency learning between the word and the color dimensions. We also combined this SOA manipulation with a set size manipulation (Bugg & Hutchison, 2013) to moderate the contribution of contingency learning and item-specific processes to the observed ISPC effect. We expected that the change in the magnitude of the ISPC effect as a result of SOA would follow different patterns for the 2-item and 4-item set conditions. Results showed that the SOA manipulation influenced the ISPC effect. Specifically, when the word followed the color with a 200 ms delay, the observed ISPC effect was smaller, if at all present, than the ISPC effects in other negative and positive SOA conditions, regardless of set size. In conclusion, our results showed that the ISPC effect was not observed if the word arrived too late. We also conducted additional awareness and RT distribution analyses (delta plots) to further investigate the ISPC effect. These analyses showed that a higher percentage of participants were aware of the ISPC manipulation in the 2-item set condition compared to the 4-item set condition. Delta plots revealed that the ISPC effect was smaller for fastest responses and increased as the responses got slower.http://journal.frontiersin.org/Journal/10.3389/fpsyg.2014.01410/fullcognitive controlconflict monitoringcontingency learningStroop taskISPC effectstimulus onset asynchrony |
| spellingShingle | Nart Bedin Atalay Mine eMisirlisoy ISPC effect is not observed when the word comes too late: A time course analysis Frontiers in Psychology cognitive control conflict monitoring contingency learning Stroop task ISPC effect stimulus onset asynchrony |
| title | ISPC effect is not observed when the word comes too late: A time course analysis |
| title_full | ISPC effect is not observed when the word comes too late: A time course analysis |
| title_fullStr | ISPC effect is not observed when the word comes too late: A time course analysis |
| title_full_unstemmed | ISPC effect is not observed when the word comes too late: A time course analysis |
| title_short | ISPC effect is not observed when the word comes too late: A time course analysis |
| title_sort | ispc effect is not observed when the word comes too late a time course analysis |
| topic | cognitive control conflict monitoring contingency learning Stroop task ISPC effect stimulus onset asynchrony |
| url | http://journal.frontiersin.org/Journal/10.3389/fpsyg.2014.01410/full |
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