The contribution of color information to rapid face categorization in natural scenes
Color’s contribution to rapid categorization of natural images is debated. We examine its effect on high-level face categorization responses using fast periodic visual stimulation (Rossion et al., 2015). A high-density electroencephalogram (EEG) was recorded during presentation of sequences of...
| Main Authors: | , , |
|---|---|
| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2019
|
| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/90306 http://hdl.handle.net/10220/49453 |
| _version_ | 1824454021237178368 |
|---|---|
| author | Or, Charles C.-F. Retter, Talia L. Rossion, Bruno |
| author2 | School of Social Sciences |
| author_facet | School of Social Sciences Or, Charles C.-F. Retter, Talia L. Rossion, Bruno |
| author_sort | Or, Charles C.-F. |
| collection | NTU |
| description | Color’s contribution to rapid categorization of natural
images is debated. We examine its effect on high-level
face categorization responses using fast periodic visual
stimulation (Rossion et al., 2015). A high-density
electroencephalogram (EEG) was recorded during
presentation of sequences of natural object images
every 83 ms (i.e., at F ¼ 12.0 Hz). Natural face images
were embedded in the sequence at a fixed interval of F/
9 (1.33 Hz). There were four conditions: (a) full-color
images; (b) grayscale images; and (c) and (d) phasescrambled
images from Conditions 1 and 2, respectively,
making faces and objects unrecognizable. Observers’
task was to respond to color changes of the fixation
cross (Experiment 1). We found face-categorization
responses at 1.33 Hz and its harmonics (2.67 Hz, etc.)
over occipitotemporal areas, with right-hemisphere
dominance; responses to color images were not
significantly different from those to grayscale images.
Behavioral analysis revealed longer response times when
images contained color, despite nearly-all-correct
performance in all conditions, suggesting that color
change in the task might detract from color’s
contribution to face categorization. We subsequently
changed the task to responding to fixation shape
changes so that such response-time differences were
eliminated (Experiment 2). The aggregate facecategorization
response became 21.6% stronger to color
than to grayscale images. This color advantage occurred
late, at 290–415 ms after stimulus onset. Our results suggest that the color advantage for face categorization
interacts with behavior, and that color only has a
moderate and relatively late contribution to rapid face
categorization in natural images. |
| first_indexed | 2025-02-19T03:15:41Z |
| format | Journal Article |
| id | ntu-10356/90306 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2025-02-19T03:15:41Z |
| publishDate | 2019 |
| record_format | dspace |
| spelling | ntu-10356/903062020-03-07T13:00:26Z The contribution of color information to rapid face categorization in natural scenes Or, Charles C.-F. Retter, Talia L. Rossion, Bruno School of Social Sciences Face Categorization Color Vision Social sciences::Psychology Color’s contribution to rapid categorization of natural images is debated. We examine its effect on high-level face categorization responses using fast periodic visual stimulation (Rossion et al., 2015). A high-density electroencephalogram (EEG) was recorded during presentation of sequences of natural object images every 83 ms (i.e., at F ¼ 12.0 Hz). Natural face images were embedded in the sequence at a fixed interval of F/ 9 (1.33 Hz). There were four conditions: (a) full-color images; (b) grayscale images; and (c) and (d) phasescrambled images from Conditions 1 and 2, respectively, making faces and objects unrecognizable. Observers’ task was to respond to color changes of the fixation cross (Experiment 1). We found face-categorization responses at 1.33 Hz and its harmonics (2.67 Hz, etc.) over occipitotemporal areas, with right-hemisphere dominance; responses to color images were not significantly different from those to grayscale images. Behavioral analysis revealed longer response times when images contained color, despite nearly-all-correct performance in all conditions, suggesting that color change in the task might detract from color’s contribution to face categorization. We subsequently changed the task to responding to fixation shape changes so that such response-time differences were eliminated (Experiment 2). The aggregate facecategorization response became 21.6% stronger to color than to grayscale images. This color advantage occurred late, at 290–415 ms after stimulus onset. Our results suggest that the color advantage for face categorization interacts with behavior, and that color only has a moderate and relatively late contribution to rapid face categorization in natural images. MOE (Min. of Education, S’pore) Published version 2019-07-24T01:12:17Z 2019-12-06T17:45:20Z 2019-07-24T01:12:17Z 2019-12-06T17:45:20Z 2019 Journal Article Or, C. C.-F., Retter, T. L., & Rossion, B. (2019). The contribution of color information to rapid face categorization in natural scenes. Journal of Vision, 19(5), 20-. doi:10.1167/19.5.20 https://hdl.handle.net/10356/90306 http://hdl.handle.net/10220/49453 10.1167/19.5.20 en Journal of Vision © 2019 The Authors. This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. 20 p. application/pdf |
| spellingShingle | Face Categorization Color Vision Social sciences::Psychology Or, Charles C.-F. Retter, Talia L. Rossion, Bruno The contribution of color information to rapid face categorization in natural scenes |
| title | The contribution of color information to rapid face categorization in natural scenes |
| title_full | The contribution of color information to rapid face categorization in natural scenes |
| title_fullStr | The contribution of color information to rapid face categorization in natural scenes |
| title_full_unstemmed | The contribution of color information to rapid face categorization in natural scenes |
| title_short | The contribution of color information to rapid face categorization in natural scenes |
| title_sort | contribution of color information to rapid face categorization in natural scenes |
| topic | Face Categorization Color Vision Social sciences::Psychology |
| url | https://hdl.handle.net/10356/90306 http://hdl.handle.net/10220/49453 |
| work_keys_str_mv | AT orcharlescf thecontributionofcolorinformationtorapidfacecategorizationinnaturalscenes AT rettertalial thecontributionofcolorinformationtorapidfacecategorizationinnaturalscenes AT rossionbruno thecontributionofcolorinformationtorapidfacecategorizationinnaturalscenes AT orcharlescf contributionofcolorinformationtorapidfacecategorizationinnaturalscenes AT rettertalial contributionofcolorinformationtorapidfacecategorizationinnaturalscenes AT rossionbruno contributionofcolorinformationtorapidfacecategorizationinnaturalscenes |