"Leila is participating in a study where she is asked to decide whether a string of letters is a word as quickly as she can. Leila is doing the task."

Lexical decision

Explanation: Lexical decision task is a cognitive exercise in which participating individuals decide whether a combination or string of letters is a word or not. The speed or time taken to reach such decision is measured. The Lexical decision task is aimed at understanding the organization and Retrieval pattern of the long term memory. An example of Lexical Decision Task could be, when given a string of letters such as 'SCHOOL', response time to affirm that it is an English word is measured or when given a string 'VNIT', response time to affirm that it isn't a word is measured.

answer; i believe that the correct answer is ; unified

answer; correlational;