Table 1 Task Information.

From: Dynamically predicting comprehension difficulties through physiological data and intelligent wearables

Task

Level (CEFR)

Expected difficulty

Number of regions

Flesch-Kincaid score

Text 1

A2

Simple

2

61.9

Text 2

B2

Intermediate

3

58.7

Text 3

C2

Difficult

2

44.2

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