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Table 2 Correlations between the individual task variables and the endophenotypic construct

From: Relationship between endophenotype and phenotype in ADHD

  

first-borns

second-borns

Task

Measure

z-scores

raw data

z-scores

raw data

Stop task

Stop signal reaction time

.66

.63

.67

.64

Shifting attentional set

% errors

.63

.67

.67

.71

Time reproduction

Absolute deviation

.70

.59

.74

.67

Visuo-spatial sequencing

N identified targets correct order

.73

.72

.79

.80

Digit span

N backwards

.55

.53

.69

.69

Pursuit

Precision

.74

.64

.77

.65

Tracking

Precision

.60

.55

.54

.48

Tapping

Variability

.46

.50

.49

.47

Baseline speed

Variability

.52

.48

.70

.62

Motor timing

Variability

.71

.56

.73

.52