Source: https://www.researchgate.net/profile/Jeroen-Vaes-2/publication/234538950_Vaes_J_Paladino_M_P_Leyens_J_Ph_2004_Perspective_taking_in_an_intergroup_context_and_the_use_of_uniquely_human_emotions_Drawing_an_E_on_your_forehead_International_Review_of_Social_Psychology_17_3_5-2/links/5ba8d05ca6fdccd3cb6ea111/Vaes-J-Paladino-M-P-Leyens-J-Ph-2004-Perspective-taking-in-an-intergroup-context-and-the-use-of-uniquely-human-emotions-Drawing-an-E-on-your-forehead-International-Review-of-Social-Psychology.pdf