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What task do participants complete in the lexical decision task?

  1. Decide if a string of letters is a word or a nonword

  2. Count the number of words in a sentence

  3. Repeat words after hearing them

  4. Identify synonyms for given words

The correct answer is: Decide if a string of letters is a word or a nonword

In the lexical decision task, participants are presented with a string of letters and must determine whether it forms a real word or a nonword. This task is designed to assess cognitive processes related to language and word recognition. By deciding if the string is meaningful or not, participants engage their vocabulary knowledge and semantic processing abilities. The other choices involve different cognitive functions that do not reflect the specific goal of the lexical decision task. Counting words in a sentence focuses on numerical processing and comprehension, repeating words emphasizes auditory memory and speech production, while identifying synonyms tests vocabulary breadth and semantic knowledge rather than the fundamental ability to differentiate between words and nonwords.