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Table 1 Overview and description of the different outcomes of the d2 test of attention

From: Fatty fish intake and attention performance in 14–15 year old adolescents: FINS-TEENS - a randomized controlled trial

Outcome

Description

Concentration performance (CP)

Total number of correctly cancelled out target characters minus commission errors

Total performance (TN-E)

Total number of characters processed minus total errors made

Processing speed (TN)

Total number of characters processed

Omission errors (E1)

Unmarked target characters

Commission errors (E2)

Incorrectly marked distraction characters

Total errors

The sum of E1 and E2 errors