Hierarchical Attention Training is a behavior training program designed for increasing attention skills. The program includes 48 combinations of attention activities at varying degrees of difficulty. The four areas covered are Focused Attention (user presses the space bar each time a specific visual stimulus appears; stimuli are single digits or letters, or sequences of three numbers or letters), Selective Attention (same as Focused Attention, except that a constantly changing visual background is used to create distraction), Alternating Attention (the visual stimulus changes, from odd to even numbers, numbers less than to greater than 10, letters before M to after M, and letter sequences), and Divided Attention (same as Alternating Attention, with the additional requirement of keeping track of number of stimuli presented). Features include reaction time measurements, saving and printing of progress reports, and modification of difficulty level of lessons. COMPATIBILITY: For use with IBM and compatible computers. SYSTEM REQUIREMENTS: Microsoft Windows 98, 2000, XP, Vista or 7 with 128 megabytes (MB) RAM.