Haptic pleasantness, naturalness, and complexity, of geometric raised line drawings

In vision, stimulus pleasantness has been shown to relate to complexity following an inverted U-curve or a linear relationship. At the same time, geometric patterns that are more associated with nature are found to be perceived as more pleasant. However, little is known about how pleasantness relates to naturalness and complexity of tactile geometric patterns. Therefore, we investigated whether haptic pleasantness depends on complexity, and naturalness of a geometric pattern. Because exploratory hand movements have been shown to depend on the haptic property to be extracted and can depend on complexity we also recorded hand movements. We examined the influence of perceived naturalness and complexity on movement speed.