From reading this article, I learned that you should get variation when the subject moves. You see this happening especially when the subject is standing. If the subject is standing they tend to switch weight on their feet, from foot to foot and start to fidget. If the light source that you are using is very close to the subject the distance change from when the model has weight on the right foot instead of the left foot. Where you are testing the lighting from could be very significant. The relative effect is amplified the closer you are to the light. When the light gets closer it obviously gets brighter. The inverse square law is when the light intensity is is inversely proportional to the square of the distance traveled. So as the distance increases, the intensity decreases. In our next unit I plan to take lighting into consideration and pay more attention to it because it does affect the way the photo turns out.
I read a article on positioning for portrait photography. The basic positioning tips are to position the body and head facing different directions, for the masculine pose you should tilt the top of your head toward the far shoulder, and for the feminine pose you should tilt the top of the head toward the near shoulder. Some hand posing tips are to not show surfaces of the hand instead show the finger's edges, fingers should not be facing into the lens, fingers should be bent at all joints, male hands should be more closed and female hands should be more open, use opposing diagonals: Example: head resting on arm, fingers should not be intertwined, never rest head on a fist. Some important posing tips were to make men a little taller than women, stagger head heights, pose groups one person at a time that are in relation to each other, pose men to the right of the frame and women to the left. Also when shooting groups of people the image should express a tone that all the people in that group are unified, either touching each other physically or visually overlapping. I am going to incorporate some of these tips into the portrait assignments next week.