Table 4 Reliability and validity of the Oxford Non-Technical Skills (NOTECHS) tool
| Reliability/validity | Measurement |
| Inter-rater reliability | Rwg statistics very high for total score, and most dimensions and subteam scores |
| Test–retest reliability | ANOVA analysis found no differences in the mean NOTECHS scores during the three preintervention periods or three postoperative periods |
| Face and content validity | Not quantitatively assessed, but qualitatively consistent with OTAS,13 NOTSS15 and ANTS14 |
| Predictive validity | Theoretical improvement in teamwork behaviour supported by increased NOTECHS performance |
| Concurrent validity | Correlation between overall NOTECHS and technical error, and between surgical subteam NOTECHS and technical error; increase in SAQ scores post-training concurrent with an increase in NOTECHS scores |
| Convergent validity | Agreement between OTAS and NOTECHS |
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ANTS, Anaesthetists’ Non-Technical Skills; OTAS, Observational Teamwork Assessment for Surgery; SAQ, Safety Attitudes Questionnaire.
