The focus in this study is methods for screening young children’s, subitizing abilities. Subitize is in this project defined as identifying the number of things in a setsimply by quickly looking at them and without counting them one by one. The aim of the study is to compare two different screening instruments for identifyingchildren’s subitizing abilities, individually and in groups of children, in a Swedish preschool class context. In total, data from 44 children is collected, who havetaken one group test (Ability to Quickly See Quantity - AQSQ), and an individual test (Number Set Test - NST). The research question was if the children’sresults correlate with each other, or not, no matter of test conditions (individual/group). The results show a moderate to strong positive correlation, usingPearson and T-test Pair Samples Correlation (r=.559 p=