Table 2 Demographic details of participants, and measures of performance on the cardiac intentional inhibition task, dimensions of interoception, trait impulsivity, and heart rate variability.

Age

22

2

18

28

Cardiac intentional inhibition task

Go reaction time: systole (ms)

483

59

352

623

Go reaction time: diastole (ms)

481

56

360

607

Go reaction time: mean (ms)

482

57

356

615

% Go omissions: systole

2

2

0

9

% Go omissions: diastole

2

2

0

13

% Go omissions: mean

1

2

0

5

% NoGo errors: systole

4

5

0

18

% NoGo errors: diastole

4

6

0

27

% NoGo errors: mean

4

5

0

18

NoGo reaction time: systole (ms)

408

72

299

546

NoGo reaction time: diastole (ms)

397

62

289

522

NoGo reaction time: mean (ms)

405

61

294

538

% Choose-Go: systole

60

13

37

87

% Choose-Go: diastole

61

11

40

84

% Choose-Go: mean

60

11

42

84

Choose-Go reaction time: systole (ms)

524

86

357

712

Choose-Go reaction time: diastole (ms)

522

81

360

686

Choose-Go reaction time: mean (ms)

523

82

359

689

Interoception

Heartbeat tracking accuracy (‘Standard’)

0.71

0.18

0.24

0.97

Heartbeat tracking accuracy (‘Alternative’)

0.62

0.29

−0.23

0.97

Heartbeat tracking insight (accuracy-confidence discrepancy)

0.24

0.21

−0.29

0.69

Heartbeat tracking awareness (accuracy-confidence correlation)

0.26

0.48

−0.88

0.98

Confidence

4.71

1.92

0.85

7.87

Sensibility (BPQ)

2.5

0.64

1.49

3.89

Trait interoceptive prediction error (TIPE)

<0.01

1.39

−2.81

3.81

BIS

Attention

18

4

11

26

Motor

24

4

16

32

Planning

24

5

14

36

Total

66

11

49

86

CAARS-SS

ADHD index

13

4

4

21

UPPS-P

Negative urgency

29

7

16

42

Premeditation

23

4

14

30

Perseverance

20

3

14

30

Sensation seeking

38

7

21

51

Positive urgency

29

9

16

49

Heart rate variability

RMSSD

54

29

15

175

Beats per minute (bpm)

75

10

53

95