Table 1.

Descriptive statistics for texts: Mean (SD).

Valence arousal	Positive			Negative			Neutral
	Low	Medium	High	Low	Medium	High
Mean number of characters	1002.5(4.95)	1009.5(31.82)	966(48.08)	977(30.41)	969.5(38.89)	1023(27.57)	1067(110.16)
Mean number of words	166.50(0.71)	173(1.41)	170.50(7.79)	171(14.14)	171.5(17.68)	187.50(14.85)	172(10.95)
Mean Comprehensibility	6.54(0.53)	6.58(0.47)	6.50(0.35)	6.58(0.23)	6.87(0.18)	6.33(0.12)	6.69(0.41)
Arousal (SAM scale)	[1–3]	[3–6]	[6–9]	[1–3]	[3–6]	[6–9]	5
Valence (SAM scale)	[6–9]			[1–3]			5

Valence and Arousal: [1–3]: 1 and 3 are included. [3–6]: 3 and 6 are excluded.

Comprehensibility: 12 judgements on a Likert scale from 1 (not comprehensible) to 7 (very comprehensible).