"The CAMM is a 25-item measure of mindfulness and assesses the degree to which children and adolescents observe internal experiences, act with awareness, and accept internal experiences without judging them.
Scoring: Respondents are asked to indicate how true each item reflects their experience using a 5-point scale ranging from 0 (Never true) to 4 (Always true). A total acceptance-mindfulness score can be generated by reverse scoring negatively worded items (see below) and summing the item total, yielding a possible range in scores from 0-100. Higher scores indicate higher levels of acceptance and mindfulness.
Reverse-scored items: 2, 4, 5, 7, 8, 10, 11, 15, 16, 17, 18, 19, 20, 21, 25
Reliability: The CAMM demonstrates good internal consistency, with Cronbach’s alpha = .87.
Validity: Research using the CAMM suggests the measure has good concurrent validity.
Reference:
Greco, L. A., Dew, S. E., & Ball, S. (2005). Acceptance, mindfulness, and related processes in childhood: Measurement issues, clinical relevance, and future directions. In S.E. Dew & R. Baer (Chairs), Measuring Acceptance, Mindfulness, and Related Processes: Empirical Findings and Clinical Applications across Child, Adolescent, and Adult Samples. Symposium presented at the Association for Behavior and Cognitive Therapies, Washington, DC."
Information quoted from Ciarrochi, J. & Bilich, L. (2006). Process measures of potential relevance to ACT. Unpublished manuscript, University of Wollongong, Australia.