Read and Repeat: Can repetition and text enhancement improve language learning?

Does repeating a word in a text improve the comprehension and spelling of college students studying Spanish? How many repetitions is enough? How many is more than enough? Does making some words bold, italicized or underlined help with definitions and spelling? Those are some of the questions UC Davis Spanish professor Claudia Sanchez-Gutiérrez, graduate student Pablo Robles-García, and Mercedes Pérez-Serrano, a language professor in Spain, asked in a recent study.