This study assessed the effectiveness of counterfactual reasoning and relax
ation training in reducing worry and defensive pessimism. Thirty-three part
icipants classified as both worriers and defensive pessimists were allocate
d to either counterfactual reasoning, relaxation training, or control group
s. Participants in counterfactual reasoning and relaxation training groups
attended four weekly training sessions. Significant reductions in worry bet
ween Dre- and post-test were evident for scores on the Worry Domains Questi
onnaire, as well as a reduced tendency to engage in the kind of prototypica
l thinking characteristic of defensive pessimists as assessed by the Defens
ive Pessimism I Strategic Optimism Strategy Prototypes Questionnaire. Reduc
tions were also evident in the percentage of the day spent worrying, the in
trusiveness of worries, and ratings of the likelihood of worry events occur
ring.