Psychologists from the University of Liverpool and the University of Milan conducted a study involving about 2,300 students in Italy aged between six to 17 years and asked them to complete a number of mathematical tasks, including simple arithmetic and problem-solving.
In this study, the participants’ degree of handedness was ascertained by the Edinburgh Handedness Inventory, a questionnaire which assesses how much an individual is right- or left-handed (or ambidextrous). The researchers then analysed the results in relation to the extent to which they were right- or left-handed.