Can probability combinations/ estimations be assessed in preschoolers with the use of computers (PowerPoint)?

The aim of this study is to assess and investigate how many combinations can be manipulated by preschoolers in a probabilistic task. The task was computer- based and included 3 trials with alterations among the colour- combinations and proportions of the sample space. With the use of intuitive thinking or more concrete reasoning children at the age of 5-6, showed that they posses the notion of most/least likely when there are 2 and 3 combinations (not 4).