The data also include information on farmers' perception of the patterns of temperature and rainfall over the past 20 years.
The illusory perception of these patterns is connected to the figure and ground perception, and in particular, in the Bulge patterns, grouping of dots together creates an illusory figure shape, on top of a textured background (here a checkerboard can be also a grid).
A considerable amount of work on this subject has been inspired by the theories of the Gestalt psychologists Max Wertheimer, Wolfgang Köhler, and Kurt Koffka, whose semiempirical, semiphilosophical researches into the perception of form and pattern seem to make direct contact with many of the more puzzling features of our experience of art.
Models of the theoretical perception of the average colour pattern suggest that the crabs are physiologically capable of discriminating variation in spot size and distribution.
This mental representation altered their perceptions of the second pattern, by "pushing" the motion of the dots away from the true direction.
Hearing appears to be particularly adapted to temporal perception, since the pattern of auditory excitement shows little inertial lag, closely following the physical duration of successive stimuli.
It is based on the fact that the human perception of a pattern depends not only on the amount of change in intensity of the stimulus but also on the original stimulus intensity.
These were: i) providers' role in the health centre, their typical routine, and their position in relation to others in the facility; ii) challenges faced in day-to-day work; iii) perceptions of the work patterns and work culture in the facility, including relationships with colleagues and health centre managers; and iv) understanding of, and attitudes towards, the introduction of HIV services.
Wilson, Wilkinson & Assad proposed that the perception of Glass patterns occurs through the ventral stream within the neurophysiological account of visual perception.
