AbstractAimThe self‐regulatory executive function model suggests that metacognitive beliefs play a role in all forms of psychological disorder, including psychosis. However, our understanding of these beliefs and their relationship with symptoms in adolescents with an at‐risk mental state (ARMS) for psychosis is limited.MethodsThe Metacognitions Questionnaire short form (MCQ‐30) was administered to 31 adolescents with an identified ARMS. Scores were subsequently compared to a control group of 76 adolescents drawn from a community population.ResultsAs predicted, ARMS patients scored significantly higher on metacognition subscales, with negative beliefs (F = 42.97, P = 0.001), cognitive confidence (F = 17.11, P = 0.001) and need for control (F = 22.48, P = 0.001) subscales of the MCQ‐30 distinguishing them from the comparison group.ConclusionsThe finding that metacognitive beliefs are significantly elevated in comparison to a community sample of adolescents is in keeping with previous adult‐orientated research. Possible implications for clinical practice are discussed.