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Crime scene investigation is one of the most important steps for the investigation and trial process. The crime scene can provide lots of clues such as physical evidence, modus operandi, etc., which helps an investigator find links to the suspect. Crime scene investigators’ ability to collect evidence and assess crime scenes could help the investigator solve crime efficiently and accurately. There are currently few studies about investigative thinking and decision making during crime scene investigation. The aim of this research is to compare investigative thinking of experts and novices through interview and eye tracking data.

In this study we use omnidirectional camera to scan the criminal scene in order to construct the virtual reality (VR) scenario. Forty-eight participants were recruited from Central Police University and other forensic departments, categorized as experts or trained novices based on their practical experience. The expert and novice investigators wore the VR headset with eye trackers and their investigation strategies were compared in simulated crime scenes from eye tracking data of gaze plot and heat map and hotspot gaze. The participants were interviewed for their investigative and logical thinking during the simulated crime scene investigation.

The results show that the experts searched for evidence more efficiently than the novices because of their prior experience, while making deductions from the crime scenes more conservatively. Finally, we suggest that VR system with eye tracking could be a useful tool for investigators’ training in assessing the crime scene.

This study extended the project of “The Study on Rotational Motion Perception and Eye Tracking in Motion Forms”. By using eye-tracking equipment and technology, the visual movement and eye tracking change of perception were investigated, and the relationship between motion illusion perception and eye movement was analyzed. The related studies on motion perception of a column of rotational motion illusion in kinetic art are classified into “forms change” and “continuous line graphic on the form”. However, as the graphic on the surface is focused on “continued line graphic”, it is not extended to “discontinued line graphic.” This study focused on the “discontinued line graphic” and combined eye-tracking with vision tracking. With the standard of the best geometric form of induced movement of motion illusion perception, different types of discontinued line graphics were observed and compared for finding the difference.

The golden ratio (GR) is an irrational number (close to 1.618) that repeatedly occurs in nature as well as in masterpieces of art. The GR has been considered a proportion perfectly representing beauty since ancient times, and it was investigated in several scientific fields but with conflicting results. This study aims at investigating if this proportion is associated with a judgment of beauty independently of the type of the stimulus, and the factors that may affect this aesthetic preference. In Experiment 1, an online psychophysical questionnaire was administered to 256 volunteers asked to choose among three possible proportions between the parts of the same stimulus (GR, 1.5, and 1.8). In Experiment 2, we recorded eye movements of 15 participants who had to express an aesthetic judgment on the same stimuli as Experiment 1. The results revealed a slight overall preference for GR (53%, p < 0.001), with higher preferences for stimuli representing humans, anthropomorphic sculptures, and paintings, regardless of the cultural level. In Experiment 2, a shorter dwell time was significantly associated with a better aesthetic judgment (p = 0.005), suggesting the possibility that GR could be associated with easier visual processing, and it could be hence considered as a visual affordance.