Barrett stresses the importance of description in criticizing works, because it lays a foundation on which a person can base her critical positions.
-Descriptions are facts; they are true and can be tested by observation.
-Subject matter is what is actually in the photo, whereas the subject of the photo is a theme or meaning of a photo. Discussing the subject tends to be more of an interpretive conversation than a descriptive one, because different people can find different themes in a photo.
-Describing the form of a photo, or how the subject matter is displayed, is also important. The composition and arrangement of the subject matter in the photo, as well as the contrast, color ranges, grain, depth of field, angle of the shot, and the lens used are important to describe, because these elements greatly impact the photo.
-Descriptions including the medium are important as well. The camera, film, and paper used, as well as whether the image is in color or black and white can be included in descriptions.
-Noting the style of the piece, as well as comparing and contrasting the work to other photographs and works of art is often used by critics as well.
-These descriptions can be obtained in two ways: from either internal or external sources. Many times, external sources of information that helps give context to the photograph.