A larger picture also increases recall of facts from the article it accompanies. Increasing picture size also increases attention to the picture. The reader is more likely to read text accompanied by a large photo. Larger pictures give the reader a sense of being there. For example, the picture to the right shows more detail,capturing the reader's attention.
Color also appeals more to learners and increases motivation to read accompanying text.
Pictures can be interpreted many different ways. Without captions, readers may have trouble understanting what information a photograph is trying to convey. Captions should be used with pictures to help the reader interpret the information and place it in proper reference.