Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off
Reading...
Front

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key

image

Play button

image

Play button

image

Progress

1/6

Click to flip

6 Cards in this Set

  • Front
  • Back
Generally, when sleep is restricted to say, 3hrs a night over a week,what would happen?
there would be little sleep onset latency, little stage 1 sleep, an increase in stage 2, a reduction in stage 3 and a big increase in stage 4. Sleep would become more efficent.
What happened when sleep was gradually reduced by half an hourevery three weeks?
All was OK until it reached 4-5hr mark. Mood changes did not occur until the 5.5hr mark. subjects became really efficient sleepers.
What happened after the experiment had ended at 5hrs sleep?
the subjects went back to about 6.5hrs sleep a night on a permanent basis. However it could be that they had habituated to the sleepiness they felt.
What did this study show?
that sleep is not a bad habit, but that a minumum is needed, although it might be able to be reduced somewhat.
Explain James Horne's core sleep and optional sleep
He stated that core sleep was 5-6hrs and optional sleep is the rest. However, he said that missing out on the optional sleep might give you an extra 2 hrs during the day, but how productive are you going to be in this time?
What did David Dinges find out about reduced sleep and performance?
he found that of three groups who received 4, 6 and 8 hrs anight that those even getting 6 and 8 hrs anight were still showing reduced reaction time on tasks.