![]() ![]() ![]() One of the outstanding questions in the field of attention and affective neuroscience concerns the search for visual features that constitute the “emotionality” of a visual scene and facilitate involuntary attentional orienting toward emotionally significant contents. Taken together, these findings provide evidence for the modulatory role of picture color on a cascade of coordinated perceptual processes: by facilitating the higher-level extraction of emotional content, color influences the duration of the attentional bias to briefly presented affective scenes in lower-tier visual areas. Consistent with neural data, unpleasant scenes were rated as being more emotionally negative and received slightly higher arousal values when they were shown in color than when they were presented in grayscale. Furthermore, classical and mass-univariate ERP analyses indicated that, when presented in color, emotional scenes elicited more pronounced early negativities (N1–EPN) relative to neutral scenes, than when the scenes were presented in grayscale. The results showed (a) that the distraction effect was greater with color than with grayscale images and (b) that it lasted longer with colored unpleasant distractor images. Concurrently we measured the visual event-related potentials (ERPs) evoked by the unpleasant and neutral background scenes. ![]() In the visual detection task, participants attended to flickering squares that elicited the steady-state visual evoked potential (SSVEP), allowing us to analyze the temporal dynamics of the competition for processing resources in early visual cortex. Such a short presentation poses a challenge for visual processing. While participants performed a demanding visual foreground task, complex unpleasant and neutral background images were displayed in color or grayscale format for a short period of 133 ms and were immediately masked. Much of this was going to be a comment presenting the opposite point of view to but another couple of sentences made it an answer.Is color a critical feature in emotional content extraction and involuntary attentional orienting toward affective stimuli? Here we used briefly presented emotional distractors to investigate the extent to which color information can influence the time course of attentional bias in early visual cortex. It's also not uncommon for B&W printing to be easier (less far to go the the printer) and much cheaper (or uncounted and essentially free) than colour. Paper copies are also easier on public transport unless you have a very good and large tablet. You can't assume your readers will work on screen - an interesting paper may want to be annotated (I've not yet found a pdf-markup solution that comes close to pen&paper for this). colour maps can easily be chosen to be continuous and monotonic - though this isn't usually the default.īoth of these approaches are a small step towards helping colour-blind readers as well.as well as coloured, with colours chosen to render different shades of grey. It is very possible (and in some cases required) to produce most figures in a way which either doesn't hinder the B&W reader too much, while still aiding the reader who works in colour. So if you submit colour figures (and I generally do), you may as well go for good clear distinctions between data sets, and print B&W yourself to check. Figures supplied in colour may (i) upset the editorial staff or software (extra hassle for you) (ii) be chargeable (to avoid this you may have to resubmit figures, extra hassle) (iii) reduce to greyscale rather inconsistently with what you expect. In general some degree of half-toning will be used, meaning that a limited set of grey scales can be output in the printed journal, so figures supplied in greyscale should come out in greyscale. ![]()
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