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Effectiveness of nasal dilators in preventing snoringFeatured science projectScience project video


The materials required for the experiment:

-    1 digital video camcorder that records directly to DVDs. Ensure that the camcorder has night vision functionality
-    20 blank DVDs
-    10 external nasal dilators
-    1 DVD player
-    1 television
-    1 stopwatch


1.    For this experiment, the independent variable is the participants sleeping without the nasal dilator and with an external nasal dilator. The dependent variable is the length of time for which a participant snores during a night’s sleep. This is determined by viewing the video recorded the night before and measuring the time with a stopwatch. The constants (control variables) are the type of nasal dilator, the length of observation and the number of participants.

2.    Select ten participants known to have snoring problems to take part in this experiment. For each of the participants, for the first 10 days, place the digital video camcorder in each of their bedrooms every night and record them whilst they sleep. The recording will be done for 8 hours while they sleep.

3.    The next day, play back the DVD to time the number of hours that the participants spend snoring during the 8 hours of sleep. Record your readings in a table, as shown below.

4.    Then, give each of the 10 participants an external nasal dilator to use while sleeping. Repeat steps 2 and 3 every day for a period of 10 days, using the same 10 participants. Note the number of hours during which the participants were recorded snoring while using the nasal dilator, and record your readings in a table.

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Complexity level:
Project cost ($):
Time required:
1 day for preparation, 200 days for experiment
Material availability:
Easily found. Nasal dilators may be purchased a drugstore
Safety concerns: