Table 3 Robustness, precision and accuracy during the validation sequence before and after the face-to-face conversation. Quality indices were averaged for gaze data on left and right eyes, nose, and mouth.

From: Evaluation of an eye tracking setup for studying visual attention in face-to-face conversations

 

Pre-conversation

Post-conversation

t(41)

p

r

Mean

SD

Mean

SD

Robustness

% valid data

95.54

6.90

93.96

11.17

0.98

0.332

0.15

Precision (SD)

In degrees

0.45

0.16

0.45

0.18

− 0.09

0.932

0.01

In cm

1.03

0.39

1.03

0.41

   

Accuracy

In degrees

0.52

0.19

0.50

0.24

0.51

0.610

0.08

In cm

1.21

0.43

1.14

0.55

   
  1. Precision (SD) = standard deviation of data samples (Holmqvist et al., 2011).