1

Abstract Group Participation

Jooyoung Kim 2

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.

Jooyoung Kim 3

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

Jooyoung Kim 4

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

Jooyoung Kim 5

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

Introduction

Ethan Binder 7

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.

Ethan Binder 8

Poor Sleep can lead to:

Increased tension Irritability Depression Confusion Lower life satisfaction

Ethan Binder 9

Is Sleeping Consistency Important? You Bet’cha

Students that sleep 8 hours nightly but shift their sleep-wake cycle by 2 hours experience increased feelings of depression and difficulty concentrating

Ethan Binder 10

Other Studies

Show that students don’t always connect poor sleep with academics.

External sources get blamed, “I don’t know why I bombed that test, I studied all night”

Ethan Binder 11

REM Sleep

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

Ethan Binder 12

How Much Do You Know about Sleep? When Asleep, your

brain is at Rest? (True or False)

False

Ethan Binder 13

How Much Do You Know about Sleep? Resting in bed is the

same as sleeping? (True or False)

False

Ethan Binder 14

More Questions (Yeah)

Studying extra late at night will help you do better on a test. (true or false

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.

Ethan Binder 15

On to the next presenter

16

Experimental Procedures Results

Elika Sakazaki 17

Experimental Procedures

WARNING!…you can’t just ask anyone

Conditions– Undergraduate

students

– Students who do not work

– Full-time students (12+ units per semester)

Objective1. 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.

Elika Sakazaki 18

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

20.8

2.93

2.5 3.8

3 2.6

3.5

3.6

2.4

3.98

Elika Sakazaki 19

Experimental Procedures

4. Find the Average GPA for similar average hours of sleep.

(Example on right)

Average Hours

GPA

2 1.865

2.5 3.8

3 2.6

3.3263.5

Elika Sakazaki 20

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)

Average Hours of sleep vs. Average GPA

0

0.5

1

1.5

2

2.5

3

3.5

4

4.5

0 2 4 6 8 10 12

Average sleep (Hours)

Avera

ge GP

A (4.0

scale

)

Elika Sakazaki 21

Experimental Procedures

6. Add TREND-LINE.

– Right click on data point and add trend-line.

– Used to help interpret data.

(Example on right)

Average Hours of sleep vs. Average GPA

0

0.5

1

1.5

2

2.5

3

3.5

4

4.5

0 2 4 6 8 10 12

Average sleep (Hours)

Avera

ge GP

A (4.0

scale

)

Elika Sakazaki 22

Results

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

Getting tired yet?

On to next presenter…

24

Discussion

Marilyn Green 25

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)

Marilyn Green 26

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

Marilyn Green 27

We neither accept or reject our hypothesis because... 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

Marilyn Green 28

Places for error

Students may have stretched the truth for whatever reason and lied about their actual GPA or amount of sleep

Marilyn Green 29

Future Experiments

This experiment could be better explored if we:apply it to graduate students because…

they are interested in the field they are studyingmore apt to work harder

address the many other factors that affect GPA

Marilyn Green 30

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.