Question: When people learn a new task, their performance usually improves when they are tested the next day, but only if they get at least 6

  1. When people learn a new task, their performance usually improves when they are tested the next day, but only if they get at least 6 hours of sleep (Stickgold, Whidbee, Schirmer, Patel, & Hobson, 2000). The following data demonstrate this phe-nomenon. The participants learned a visual discrim-ination task on one day, and then were tested on the task the following day. Half of the participants were allowed to have at least 6 hours of sleep andthe other half were kept awake all night. Is there a significant difference between the two conditions? Use a two-tailed test with a = .05.

  1. Performance Scores

  1. 6 Hours Sleep n=14, M=72, SS=932

  1. No Sleep n=14,M=65, SS=706

A. Show your computations

B. Complete APA line for the t-test (including effect size - r2)

C. Paragraph answering the research question.

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