1. 1 4 Abstract 4 Group Participation

2. Jooyoung Kim2 Hypothesis  There is a direct relationship to the amount of sleep a student gets and their grade point average  The more sleep one gets the better their G.P.A will be.

3. Jooyoung Kim3 Issues…  Multiple factors conflicting with results… - Sleep Hours… naps or night? - Moral Issue… lying about GPA? - GPA… accumulative or last semester GPA? - When Hours Slept… last year or current year? - Majors… degree of difficulties

4. Jooyoung Kim4 Overview of Results  Students who slept… - 2.0 to 5.5 hrs had GPA between 2.51 to 3.32 - 6 hours to 8.5 hrs had GPA between 3.2 to 3.31 - for 9-10.5 hours had GPA between 3.65 and 4.0

5. Jooyoung Kim5 Exceptions to Results  People who average… - 2 hours of sleep had a G.P.A of 3.8 - 3 hours of sleep had a G.P.A of 3.33 - 9 hours of sleep had a G.P.A of 3.04

6. 6 4 Introduction

7. Ethan Binder7 Why Sleep At All?  During sleep your body recharges. Your brain produces the special biochemical and physiological changes that restore and recharge your body for the next day.

8. Ethan Binder8 Poor Sleep can lead to: 4 Increased tension 4 Irritability 4 Depression 4 Confusion 4 Lower life satisfaction

9. Ethan Binder9 Is Sleeping Consistency Important? You Bet’cha 4 Students that sleep 8 hours nightly but shift their sleep-wake cycle by 2 hours experience increased feelings of depression and difficulty concentrating

10. Ethan Binder10 Other Studies 4 Show that students don’t always connect poor sleep with academics. 4 External sources get blamed, “I don’t know why I bombed that test, I studied all night”

11. Ethan Binder11 REM Sleep 4 There have been reports that students who demonstrated a significant increase in REM sleep following an intensive learning period performed significantly better on examinations.

12. Ethan Binder12 How Much Do You Know about Sleep? 4 When Asleep, your brain is at Rest? (True or False) 4 False

13. Ethan Binder13 How Much Do You Know about Sleep? 4 Resting in bed is the same as sleeping? (True or False) 4 False

14. Ethan Binder14 More Questions (Yeah) 4 Studying extra late at night will help you do better on a test. (true or false 4 False. When you are sleep deprived you memory’s affected and you’ll have more trouble recalling recently learned information than if you had a good night’s sleep.

15. Ethan Binder15 4 On to the next presenter

16. 16 4 Experimental Procedures 4 Results

17. Elika Sakazaki17 Experimental Procedures 4 WARNING! …you can’t just ask anyone Conditions –Undergraduate students –Students who do not work –Full-time students (12+ units per semester) 4 Objective 1.4 group members; each submitting results from 50 different interviews. 2.Average amount of sleep in hours per night and current GPA were obtained from each interview.

18. Elika Sakazaki18 Experimental Procedures 3.Data to be plotted on a spreadsheet and calibrated in order of increasing hours of sleep along with its GPA. (Example on right). Average Hours GPA 2 0.8 2.93 2.53.8 32.6 3.5 3.6 2.4 3.98

19. Elika Sakazaki19 Experimental Procedures 4.Find the Average GPA for similar average hours of sleep. (Example on right) Average Hours GPA 21.865 2.53.8 32.6 3.326 3.5

20. Elika Sakazaki20 Experimental Procedures 5.Graph data with Average hours of sleep on the x-axis (independent variable) and Average GPA on the y-axis (dependent variable) (Example on right)

21. Elika Sakazaki21 Experimental Procedures 6.Add TREND-LINE. –Right click on data point and add trend- line. –Used to help interpret data. (Example on right)

22. Elika Sakazaki22 Results 4 The trend-line shows a gradual increase in GPA as a person increases their average amount of sleep per night. Students who slept:  2.0 to 5.5 hrs had an average GPA between 2.51 to 3.32  6 to 8.5 hrs had GPA between 3.2 to 3.31 9 to 10.5 hours had GPA between 3.65 to 4.0

23. 23 Getting tired yet? On to next presenter…

24. 24 4 Discussion

25. Marilyn Green25 In Conclusion...  What we wanted to do: - find relationship between GPA and avg. hours of sleep per night  How we did it: Questioned 200 U of A students who were… - undergraduates - without jobs - full time students (at least 12 units)

26. Marilyn Green26 What we found:  Some what positive linear graph of average hours of sleep vs. average GPA  values that threw off data -examples: 3.8 GPA student with 2hrs of sleep

27. Marilyn Green27 We neither accept or reject our hypothesis because... 4 Other factors can affect GPA - students who have children - student’s suffering from depression - student’s suffering from loved one’s death - relationships - student’s who use alcohol or drugs extensively

28. Marilyn Green28 Places for error  Students may have stretched the truth for whatever reason and lied about their actual GPA or amount of sleep

29. Marilyn Green29 Future Experiments  This experiment could be better explored if we:  apply it to graduate students because… they are interested in the field they are studying more apt to work harder  address the many other factors that affect GPA

30. Marilyn Green30 References 1. Biology 182 Lab Manual, Kaspari, Vleck, et al, 2002 2. Buboltz, C. Walter, et al, “Sleep Habits and Patterns of College Students: A Preliminary Study.” Journal of American College Health. Vol. 50, No.3.