Based on a set of experiments, this paper investigates the relationship between perceived directionality of surface textures and features from Mojette Transform. It was found that two properties of Mojette Transform (the variance and the local maximum of projection vectors) are related to human perception on directionality. Based on these features, a measurement model was proposed for perceived...

Animals in many vertebrate species vocalize in response to predators, but it is often unclear whether these antipredator calls function to communicate with predators, conspecifics or both. We evaluated the function of antipredator calls in 10 species of passerines by measuring the acoustic directionality of these calls in response to experimental presentations of a model predator. Acoustic dire...

We examined decisions based on verbal probability phrases, such as "small chance," "likely," or "doubtful" (we call these phrases verbal probabilities). Verbal probabilities have communicative functions called directionality and can be categorized into positive (e.g., "likely" or "probable") or negative (e.g., “unlikely,” “doubtful”) phrases in terms of their directionality. Previous studies ha...

Directionality is a fundamental feature of network connections. Most structural brain networks are intrinsically directed because of the nature of chemical synapses, which comprise most neuronal connections. Due to limitations of non-invasive imaging techniques, the directionality of connections between structurally connected regions of the human brain cannot be confirmed. Hence, connections ar...