Considerable research has examined the effects of giving trainees control over their learning (Steinberg, 1977(Steinberg, , 1989Williams, 1993). The most consistent finding of this research has been that trainees do not make good instructional use of the control they are given. Yet, today's technologically based training systems often provide individuals with significant control over their learning (Brown, 2001). This creates a dilemma that must be addressed if technology is going to be used to create more effective training systems. The current study extended past research that has examined the effects of providing trainees with some form of advisement or guidance in addition to learner control and examined the impact of an instructional strategy, adaptive guidance, on learning and performance in a complex training environment. Overall, it was found that adaptive guidance had a substantial effect on the nature of trainees' study and practice, self-regulation, knowledge acquired, and performance. Adaptive Guidance 2 Abstract Considerable research has examined the effects of giving trainees control over their learning (Steinberg, 1977(Steinberg, , 1989Williams, 1993). The most consistent finding of this research has been that trainees do not make good instructional use of the control they are given. Yet, today's technologically based training systems often provide individuals with significant control over their learning (Brown, 2001). This creates a dilemma that must be addressed if technology is going to be used to create more effective training systems. The current study extended past research that has examined the effects of providing trainees with some form of advisement or guidance in addition to learner control and examined the impact of an instructional strategy, adaptive guidance, on learning and performance in a complex training environment.Overall, it was found that adaptive guidance had a substantial effect on the nature of trainees' study and practice, self-regulation, knowledge acquired, and performance.Adaptive Guidance 3The Effects of Adaptive Guidance in a Complex Training Environment Advanced computer-based technologies have created a vast range of opportunities to create new training tools. As the cost of these technologies declines, an increasing number of organizations are beginning to implement technologically based training applications, such as simulations, web-based training, and distance learning. These applications offer many advantages. For example, they can create a safe training environment for individuals to learn tasks on which actual mistakes can result in serious injury or extensive damage to equipment. By allowing training to occur almost anywhere and at anytime, these applications are also very well suited for today's global companies and their dispersed employees.Perhaps the most frequently cited advantage of these emerging computer-based technologies, however, is that they allow learners to have considerable control over different aspects (e.g., content, sequence, pace...