The attractiveness () quantizes the overall appeal of the system . The hedonic quality () [@diefenbach2008give] is separable into hedonic identity () and hedonic stimulus (). focuses on a user’s identification with the system and describes the ability of a product to communicate with other persons benefiting the user’s self-esteem [@hassenzahl2007hedonic]. describes the perceived novelty of the system. is associated with the desire to advance ones knowledge and proficiencies. The clustering into these four groups for the $28$ word pairs are defined as depicted in **Tab.**\[tab:attrakdiff\_statements\].

For each participant, the order of word pairs and order of the two elements of each pair are randomized prior to the survey’s execution. A bipolar [@mccroskey1989bipolar] seven-point Likert scale is presented to the subjects to express their relative tendencies toward one of the two opposing statements () of each expression pair, where index three denotes the neutral element. For the questionnaire’s evaluation for subject , each of the seven adjective pairs per group is assigned a score by each participant, reflecting their tendency towards the positive of the two adjectives. The overall ratings per group are the mean scores computed over all subjects $s$ and statements $i$, . Here, $S$ is the number 