Subjects who pretested as low in hypnotic susceptibility either received or did not receive a second baseline susceptibility test. Half of the subjects in each baseline test condition were administered cognitive skill training to enhance susceptibility, and half were given no training. Trained subjects exhibited much higher scores than untrained subjects on the objective and subjective dimensions of two different susceptibility posttests. The number of baseline tests given to subjects did not significantly affect posttest responding. These findings support the notion that hypnotic susceptibility can be substantially modified. They argue against the idea that training-induced gains in susceptibility are an artifact of giving subjects only a single-baseline test.