PRACTICAL EVIDENCE OF CONTAGIOUS YAWNING: DE

This study aimed to determine the causes of contagious yawning which is the yawning occurs as a result of seen or hearing someone either tired, sleepy, hungry or stressful yawn. This book investigate the causes of this contagious yawning by applying practical method to be sure of this contagious yawning. Five practical were performed with 5 people in different situation. First practical were yawning near five people that can see and hear but either tired, hungry, sleepy or stressful and contagious yawning occurs. Second practical were yawning near five people that can see nor hear but were either tired, hungry, sleepy or stressful and contagious yawning occurs Third practical were yawning near five people that can hear nor see but were either tired , hungry, sleepy or stressful and contagious yawn occurs. Fourth practical were yawning near five people that can neither see nor hear but were either tired, hungry, sleepy or stressful and contagious yawn were not occurs. Fifth practical were yawning near five people sleeping from different places and contagious yawn were not occurs.