Data and code of this project refer to: The representational dynamics of the animal appearance bias in human visual cortex are indicative of fast feedforward processing (2023). Chiu-Yueh Chen, Gaëlle Leys, Stefania Bracci, and Hans Op de Beeck. https://doi.org/10.1162/imag_a_00006
The stimuli used in this project are based on 'The ventral visual pathway represents animal appearance over animacy, unlike human behavior and deep neural networks' by Stefania Bracci, J. Brendan Ritchie, Ioannis Kalfas, and Hans Op de Beeck (2019).
https://doi.org/10.1523/JNEUROSCI.1714-18.2019
## Stimulus order and Figures order ##
Please note that the stimuli order and the order in the data files from Bracci et al. 2019, and Chen et al. 2023 differ from the order presented in the figures from Bracci et al. 2019, as well as the figures from Chen et al. 2023.
You can run '**plot_fMRI_ROIs_RDM_order_ALO.m**' located in the '**code_visualization_fMRI_ROIs**' directory, to generate a visualization similar to Figure 5 from Bracci et al. 2019.
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## Dataset description ##
A folder labeled **Preprocessed Data** contains preprocessed data for each of the 30 participants in the EEG experiment:
**sub-XX_task-TASKNAME.mat**
- We have a total of 30 participants, with XX ranging from 01 to 30.
- TASKNAME can be either 'AN' or 'AP,' where 'AN' stands for the animacy task, and 'AP' stands for the animal appearance task.
For example: **sub-01-AN.mat**
A folder labeled **RSA** contains RSA files for each of the 30 participants.
The file naming convention for these files is as follows:
**ResultsStats_rsa_task_TSANAME_PerSubj.mat**
- TASKNAME can be 'Both', 'AN', or 'AP,' where 'Both' stands for the combined tasks, 'AN' stands for the animacy task, and 'AP' stands for the animal appearance task.
- Each subject in a cell contains a three-dimensional data structure with dimensions 27 x 27 x (timepoints), where timepoints can range from 1 to 176. These timepoints represent intervals spanning from 200 ms before picture onset with a 4 ms gap, continuing until 500 ms.
For example: **ResultsStats_rsa_task_AN_PerSubj.mat**
## Stimulus presentation ##
The code for stimulus presentation was generated in Psychopy. For more detailed information, you can refer to the README file inside the 'code_stimulus_presentation' directory.
