The aim of the study was to examine how the way in which a question regarding audio, visual and audio-visual stimuli is formulated could influence environment assessment.To get quantitative ratings in both modalities, a numerical scale coupled with precisely formulated questions was used for all the investigated audio, visual, and audio-visual stimuli. The participants were asked either about the comfort or the discomfort caused by the perceived stimuli. The assessments of audio and visual comfort and discomfort were carried out in a laboratory settings. In all cases an 11-point numerical scale (from 0 to 10, derived from ICBEN recommendations) was used to rank the comfort and discomfort ratings.The results show that there are no statistically significant differences between the comfort and discomfort assessment of visual samples. Actually, the comfort and discomfort ratings are equivalent in such a way that a discomfort rating can be represented as the opposite of the comfort rating, i.e. discomfort rating is equal to 10 - the comfort rating. For the audio stimuli, whether the comfort and the discomfort scales are reversible depends on both the sound level at which the stimuli were presented and on the type of stimulus.