The haptic and the visual flash-lag effect and the role of flash characteristics.
When a short flash occurs in spatial alignment with a moving object, the moving object is seen ahead the stationary one. Similar to this visual "flash-lag effect" (FLE) it has been recently observed for the haptic sense that participants judge a moving hand to be ahead a stationary hand wh...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Public Library of Science (PLoS)
2018-01-01
|
| Series: | PLoS ONE |
| Online Access: | http://europepmc.org/articles/PMC5751977?pdf=render |
| _version_ | 1819037280017317888 |
|---|---|
| author | Knut Drewing Elena Hitzel Lisa Scocchia |
| author_facet | Knut Drewing Elena Hitzel Lisa Scocchia |
| author_sort | Knut Drewing |
| collection | DOAJ |
| description | When a short flash occurs in spatial alignment with a moving object, the moving object is seen ahead the stationary one. Similar to this visual "flash-lag effect" (FLE) it has been recently observed for the haptic sense that participants judge a moving hand to be ahead a stationary hand when judged at the moment of a short vibration ("haptic flash") that is applied when the two hands are spatially aligned. We further investigated the haptic FLE. First, we compared participants' performance in two isosensory visual or haptic conditions, in which moving object and flash were presented only in a single modality (visual: sphere and short color change, haptic: hand and vibration), and two bisensory conditions, in which the moving object was presented in both modalities (hand aligned with visible sphere), but the flash was presented only visually or only haptically. The experiment aimed to disentangle contributions of the flash's and the objects' modalities to the FLEs in haptics versus vision. We observed a FLE when the flash was visually displayed, both when the moving object was visual and visuo-haptic. Because the position of a visual flash, but not of an analogue haptic flash, is misjudged relative to a same visuo-haptic moving object, the difference between visual and haptic conditions can be fully attributed to characteristics of the flash. The second experiment confirmed that a haptic FLE can be observed depending on flash characteristics: the FLE increases with decreasing intensity of the flash (slightly modulated by flash duration), which had been previously observed for vision. These findings underline the high relevance of flash characteristics in different senses, and thus fit well with the temporal-sampling framework, where the flash triggers a high-level, supra-modal process of position judgement, the time point of which further depends on the processing time of the flash. |
| first_indexed | 2024-12-21T08:18:54Z |
| format | Article |
| id | doaj.art-63b3d6d8dd62404bb1a336e7681b2d82 |
| institution | Directory Open Access Journal |
| issn | 1932-6203 |
| language | English |
| last_indexed | 2024-12-21T08:18:54Z |
| publishDate | 2018-01-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS ONE |
| spelling | doaj.art-63b3d6d8dd62404bb1a336e7681b2d822022-12-21T19:10:29ZengPublic Library of Science (PLoS)PLoS ONE1932-62032018-01-01131e018929110.1371/journal.pone.0189291The haptic and the visual flash-lag effect and the role of flash characteristics.Knut DrewingElena HitzelLisa ScocchiaWhen a short flash occurs in spatial alignment with a moving object, the moving object is seen ahead the stationary one. Similar to this visual "flash-lag effect" (FLE) it has been recently observed for the haptic sense that participants judge a moving hand to be ahead a stationary hand when judged at the moment of a short vibration ("haptic flash") that is applied when the two hands are spatially aligned. We further investigated the haptic FLE. First, we compared participants' performance in two isosensory visual or haptic conditions, in which moving object and flash were presented only in a single modality (visual: sphere and short color change, haptic: hand and vibration), and two bisensory conditions, in which the moving object was presented in both modalities (hand aligned with visible sphere), but the flash was presented only visually or only haptically. The experiment aimed to disentangle contributions of the flash's and the objects' modalities to the FLEs in haptics versus vision. We observed a FLE when the flash was visually displayed, both when the moving object was visual and visuo-haptic. Because the position of a visual flash, but not of an analogue haptic flash, is misjudged relative to a same visuo-haptic moving object, the difference between visual and haptic conditions can be fully attributed to characteristics of the flash. The second experiment confirmed that a haptic FLE can be observed depending on flash characteristics: the FLE increases with decreasing intensity of the flash (slightly modulated by flash duration), which had been previously observed for vision. These findings underline the high relevance of flash characteristics in different senses, and thus fit well with the temporal-sampling framework, where the flash triggers a high-level, supra-modal process of position judgement, the time point of which further depends on the processing time of the flash.http://europepmc.org/articles/PMC5751977?pdf=render |
| spellingShingle | Knut Drewing Elena Hitzel Lisa Scocchia The haptic and the visual flash-lag effect and the role of flash characteristics. PLoS ONE |
| title | The haptic and the visual flash-lag effect and the role of flash characteristics. |
| title_full | The haptic and the visual flash-lag effect and the role of flash characteristics. |
| title_fullStr | The haptic and the visual flash-lag effect and the role of flash characteristics. |
| title_full_unstemmed | The haptic and the visual flash-lag effect and the role of flash characteristics. |
| title_short | The haptic and the visual flash-lag effect and the role of flash characteristics. |
| title_sort | haptic and the visual flash lag effect and the role of flash characteristics |
| url | http://europepmc.org/articles/PMC5751977?pdf=render |
| work_keys_str_mv | AT knutdrewing thehapticandthevisualflashlageffectandtheroleofflashcharacteristics AT elenahitzel thehapticandthevisualflashlageffectandtheroleofflashcharacteristics AT lisascocchia thehapticandthevisualflashlageffectandtheroleofflashcharacteristics AT knutdrewing hapticandthevisualflashlageffectandtheroleofflashcharacteristics AT elenahitzel hapticandthevisualflashlageffectandtheroleofflashcharacteristics AT lisascocchia hapticandthevisualflashlageffectandtheroleofflashcharacteristics |