If you do think this function is usefull and have used it in your study, please cite our paper: Li A-S, Miao C-G, Han Y, He X and Zhang Y (2018) Electrophysiological Correlates of the Effect of Task Difficulty on Inhibition of Return. Front. Psychol. 9:2403. A possible discription in your paper: “The topographic map was generated with Yang's topoplot_bcl function based on EEGLAB's topoplot function” If your alreadly installed EEGLAB, then it is unnessary to download the "externBorrowedFuns" folder. Yang Zhang yzhangpsy at suda.edu.cn Department of Psychology Soochow University