Similar to mood, tone describes the author's attitude toward his material, the audience, or both. Tone is easier to determine in spoken language than in written language. Considering how a work would sound if it were read aloud can help in identifying an author's tone. Some words describing tone are playful, serious, businesslike, sarcastic, humorous, formal, ornate, sardonic, somber, etc. A word or phrase that links different ideas. Used especially, although not exclusively, in expository and argumentative writing, transitions effectively signal a shift from one idea to another. A few commonly used transitional words or phrases are furthermore, consequently, nevertheless, for example, in addition, likewise, similarly, on the contrary, etc. More sophisticated writers use more subtle means of transition.