Practice Test Geeks(CBT-I) CBT Insomnia Certification Practice Test
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Sleep Restriction & Stimulus Control Therapy Flashcards

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  1. What is the primary mechanism by which sleep restriction therapy improves sleep in patients with chronic insomnia?

    Answer: It builds homeostatic sleep pressure by restricting time in bed to match actual sleep time

    Sleep restriction builds homeostatic sleep drive (Process S) by limiting TIB to match actual TST, creating sleep pressure that consolidates and deepens sleep over time.

  2. In sleep restriction therapy, how is the initial time in bed (TIB) prescription typically determined?

    Answer: It is set equal to the patient's average total sleep time derived from a 1-2 week sleep diary

    Initial TIB is individualized by matching it to the patient's average TST from a baseline sleep diary, ensuring time in bed reflects actual sleep obtained.

  3. How is sleep efficiency (SE) correctly calculated in CBT-I protocols?

    Answer: Total sleep time divided by time in bed, multiplied by 100

    SE = (TST ÷ TIB) × 100; it measures the percentage of time in bed that is actually spent asleep, serving as the primary indicator for titrating TIB.

  4. What is the minimum time in bed (TIB) typically prescribed during sleep restriction therapy to protect patient safety?

    Answer: 5 hours

    A floor of 5 hours TIB is maintained in standard sleep restriction protocols to prevent the excessive sleep deprivation that could impair daytime functioning or driving safety.

  5. According to standard sleep restriction protocols, under what condition should a patient's TIB be increased?

    Answer: When sleep efficiency exceeds 85% for approximately five of seven nights

    TIB is expanded when SE consistently exceeds 85%, indicating that sleep has consolidated sufficiently to allow gradual extension of the sleep window.

  6. What is the recommended increment for expanding TIB when sleep efficiency criteria are met in sleep restriction therapy?

    Answer: 15 to 30 minutes per week

    Standard protocols increase TIB by 15-30 minutes per week when SE ≥85%, allowing gradual adjustment while preserving the sleep consolidation achieved.

  7. A patient's sleep diary shows an average total sleep time of 5.5 hours and an average time in bed of 8 hours. What is their sleep efficiency?

    Answer: 69%

    SE = (5.5 ÷ 8) × 100 = 68.75%, approximately 69%, indicating poor sleep efficiency and a strong candidate for sleep restriction therapy.

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Sleep Restriction & Stimulus Control Therapy Flashcards — CBT-I Study Cards with Answers