In this project we provide supplementary infimation for the paper reporting online investigation on the SNARC and MARC effects. The paper is currently under review. Whenever its publication status gets clarified, the exact citation information will be provided. Shared materials include: 1. Supplementary material to the paper, presenting analysis considering correct responses only, as well as between group differences in the SNARC and MARC effects. 2. Raw data is organized in two files. First of them is the dataset in which numerical values for the SNARC and MARC measures are provided, as well as considering other variables considered in the study. The sencond file contains trail by trial reaction times and accuracies for the parity judgment task. Note that this data file contains all reaction times, even considering individuals who skipped their participation. Thus, filters (as in the main datafile) should be applied to obtain meaningful results. 3. SPSS syntax we used for analysis. There are two files - one of them contains data filters as described in the paper. The other considers actual analyses we conducted. 4. Qualtrics code of the study (please mind that before running the code, JavaScript code needs to be checked for compatibility with the current version of Qualtrics platform, especially, whether the key responses given by participant are recorded). 5. PDF printout of all displays presented during the study;