2.2.1. Positive and Negative Affect Schedule

In our study, a Polish adaptation (Skala Uczu´c Pozytywnych i Negatywnych, SUPIN) [21] of the Positive and Negative Affect Schedule (PANAS) [22] was used. The PANAS consists of 20 items—adjectives describing positive and negative emotions. The items are rated by subjects on a 5-point scale (1 = "very slightly" or "not at all", 2 = "a little", 3 = "moderately", 4 = "quite a bit", 5 = "extremely") in order to assess the intensity of each affect. As a result, two 10-item subscales are created that measure the positive affect (PA) and negative affect (NA). Cronbach's α reliability indices for the scale ranged from 0.86 (PA) to 0.95 (NA).

#### 2.2.2. Mood

Mood was assessed with a Polish adaptation (Przymiotnikowa Skala Nastroju UMACL) [23] of the UWIST Mood Adjective Checklist (UMACL) [24]. The UMACL scale consists of 29 items in the form of adjectives describing mood. The surveyed people choose an answer from a 4-point scale ("definitely", "slightly", "slightly not", "definitely not"), rating the applicability of each adjective to their current mood. The UMACL measures three dimensions of mood: hedonic tone (HT), tense arousal (TA) and energetic arousal (EA). The Hedonic Tone (HT) (pleasure–displeasure) scale consists of 10 items. The Tense Arousal (TA) (nervous–relaxed) scale consists of 9 items. The Energetic Arousal (EA) (energy to act) scale consists of 10 items. Cronbach's α reliability indices for the scale ranged from 0.79 to 0.92 for the individual subscales.
