I found a book based on visual psychology and took some notes that I thought helped me with my research:
Language of Vision- Gyorgy Kepes
1995(replication of work originally by Paul Theobald, Chicago 1944)
USA, Dover Publications, Minisota
The language of vision, optical communication, is one of the strongest potential means both to reunite man and his knowledge and to reform man into an integrated being. The visual language is capable of disseminating knowledge more effectively than almost any other vehicle of communication. With it man can express and relay his experiences in object form. Visual vocabulary, or grammar, can be perceived by the illiterate as well as the literate.
Visual language can display facts and ideas in a wider and deeper range than almost any other means of communication. It can reinforce the static verbal content with the sensory vitality of dynamic imagery.
It can interpret the new inderstandi8ng of the physical world and social events because dynamic interrelationships and interpretation, which are significant of every advanced scientific understanding of today, are intrinsic idioms of the contemporary vehicles of visual communication: photography, motion pictures, and television.
But the language of vision has a more subtle and, to a certain extent, an even more important contemporary task. To perceive a visual image implies the beholders participation in a process of organization. The experience of an image is thus a creative act of integration. Its essential characteristic is that by plastic power an experience is formed into an organic whole.
Here is a basic discipline of forming, that is, thinking in terms of structure, a discipline of utmost importance in the chaos of our formless world. Plastic arts, the optimum forms of language of vision, are , therefore, anb invaluable educational medium.
Relationship of choice
In these early representational images, the hierarchy of size was intimately associated with the hierarchy of power, strength and importance. Thus, the first spatial scale had a structural correspondence to the scale of values. Size relationshiops were usewd not only as a spatial sign but also as symbols and as a means of plastic emphasis.
Own Words (Page 72)
People gauge the size of an object by the horizon line. The drawing by 11 yo Spanish child on PG 73 exemplifies how size can be used to create a hierarchy whilst retaining all relevan t information and forming a coherent piece of art.
Technical control of artificial light.
Softer the light, leaves the audience at ease and comfortable.
The increase of artificial light creates more contrast and deepens shadows creating deeper intensity.
Light and colour ( page: 134)