Instructional text is often written in a formal and impersonal style, in which the author seems invisible. Invisible authors do not tell you anything about themselves, whereas visible authors reveal information about themselves and highlight their personal perspectives (Nolen, 1995; Paxton, 2002). Converting an invisible author to a visible one can be called giving a voice to the text (Beck, McKeown, & Worthy. 1995). Take a minute to review the two descriptions of Mayer's multimedia research shown in Figure 8.11. Sample A is a factual summary of Mayer's multimedia research. Sample B discusses similar material but uses an interview format. In Sample B, Mayer speaks ...
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