The file rawdata.csv contains data accompanying the paper "Extracting statistical information about shapes in the visual environment" by Sabrina Hansmann-Roth, Andrey Chetverikov & Árni Kristjansson. This is a visual search task for an odd-one-out shape. Trials were organized in streaks with stable parameters of both feature distributions.
Short data description from the paper:
"It is well known that observers can use so-called summary statistics of visual ensembles to simplify perceptual processing. The assumption has been that instead of representing feature distributions in detail the visual system extracts the mean and variance of visual ensembles. But recent evidence from implicit testing using a method called feature distribution learning showed that far more detail of the distributions is retained than the summary statistic literature indicates. Observers also encode higher-order statistics such as the kurtosis of feature distributions of orientation and color. But this sort of learning has not been shown for more intricate aspects of visual information. Here we tested the learning of distractor ensembles for shape, using the feature distribution learning method. Using a linearized circular shape space, we found that learning of detailed distributions of shape does not occur for this shape space while observers were able to learn the mean and range of the distributions. Previous demonstrations of feature distribution learning involved simpler feature dimensions than the more complex shape space tested here, and our findings may therefore reveal important boundary conditions of feature distribution learning."
You can use them or modify the data as you wish as long as you cite the original paper (see LICENSE.txt): Hansmann-Roth, S., Chetverikov, A., & Kristjansson, A. (2023). Extracting statistical information about shapes in the visual environment, Vision Research
Additionally, please cite the data:
Hansmann-Roth, S., Chetverikov, A., & Kristjansson, A. (2023, February). Datasets: Extracting statistical information about shapes in the visual environment
Description of the variables is provided in variables_description.txt.
If you have the questions feel free to contact me at