Table 3

 Taxonomy levels 1 and 2—cognition and immediate causes of errors/actions

Total
Level 1
(I) Cognitive domain
PerceptionSituation assessment and response selectionMemoryResponse execution
72181147
(II) Error mechanism
Expectancy/selective attentionLoss of attentionInterference/confusionFalse assumption/expectationCognitive bias
79910439
Level 2
(I) Immediate internal causes
Alertness, fatigueCursory/hurried work approachLack of knowledgeInflexible application of a procedureStress, preoccupation
0632011
(II) Immediate external causes
Lack of information/incorrect, unclear, illegible informationCue similarity/proximity Pattern similarityTask interruptionOut-of-date (drugs/vaccines), out-of-order (equipment)
11124330