Handedness is an attribute of humans defined by their unequal distribution of fine motor skill between the left and right hands. A minority of people are equally skilled with both hands, and are termed ambidextrous. This book presents current research in the study of handedness, including the significance of knot-tying habits in handedness research and forensic science; manual laterality and hemispheric specialisation for language; handedness and mental rotation; handedness and achievement in sports and handedness of children determines preferential facial and eye movements.