The differential effects of four task selection methods on training efficiency and transfer in a computer-based training for Air Traffic Control were investigated. Two personalised conditions were compared with two corresponding yoked control conditions. The hypothesis that personalised adaptive task selection leads to more efficient training than non-adaptive task selection was partially confirmed. However, the hypothesis that adaptive task selection based on personalised efficiency leads to more efficient training than adaptive task selection based on personalised preference was not supported. The results are discussed and suggestions are given for future research.