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Related Concept Videos

Blind Procedures02:07

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Ideally, the people who observe and record the children’s behavior are unaware of who was assigned to the experimental or control group, in order to control for experimenter bias. Experimenter bias refers to the possibility that a researcher’s expectations might skew the results of the study. Remember, conducting an experiment requires a lot of planning, and the people involved in the research project have a vested interest in supporting their hypotheses. If the observers knew which...
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Management of Insomnia01:19

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The sleep cycle, an integral part of human health, consists of several stages with distinct characteristics and functions. It begins with a transition from wakefulness to sleep, known as the light sleep phase, followed by the restorative deep sleep phase, essential for physical recovery and growth. The cycle concludes with the Rapid Eye Movement (REM) phase, characterized by high brain activity and vivid dreaming. Insomnia, a prevalent sleep disorder, involves difficulty falling asleep, staying...
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The confirmation bias is the tendency to focus on information that confirms our existing beliefs and ignore information that is inconsistent with our expectations. For example, if you think that your professor is not very nice, you notice all of the instances of rude behavior exhibited by the professor while ignoring the countless pleasant interactions he is involved in on a daily basis. Have you ever fallen prey to the confirmation bias, either as the source or target of such bias?
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Blinding is a commonly used method of not telling participants which treatment a subject is receiving. Blinding is a critical part of a randomized control trial or RCT. It reduces the bias that affects the results. In an RCT, blinding is used in the form of a placebo. A placebo effect occurs when untreated subjects falsely believe they have received the treatment and report improved symptoms. A placebo or a dummy treatment is administered to subjects to negate the bias caused by such an effect.
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Insomnia01:27

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Insomnia is a prevalent sleep disorder characterized by difficulty falling asleep, frequent awakenings during the night, and waking up too early without being able to return to sleep. People with insomnia often experience these disruptions at least three nights a week for at least one month. Chronic insomnia, which lasts for at least three months, can lead to increased anxiety, which in turn can worsen sleep difficulties, creating a cycle of sleeplessness and stress.
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Surveys02:16

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Often, psychologists develop surveys as a means of gathering data. Surveys are lists of questions to be answered by research participants, and can be delivered as paper-and-pencil questionnaires, administered electronically, or conducted verbally. Generally, the survey itself can be completed in a short time, and the ease of administering a survey makes it easy to collect data from a large number of people.
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Related Experiment Video

Updated: Jun 17, 2025

Eye Tracking, Cortisol, and a Sleep vs. Wake Consolidation Delay: Combining Methods to Uncover an Interactive Effect of Sleep and Cortisol on Memory
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A randomized controlled trial modifying insomnia-consistent interpretation bias in students.

Marloes Duijzings1, Jemma Todd2, Lies Notebaert3

  • 1The University of Sydney, School of Psychology, NSW, Australia; Leiden University, Faculty of Social and Behavioural Sciences, Leiden, the Netherlands.

Behaviour Research and Therapy
|August 8, 2024
PubMed
Summary
This summary is machine-generated.

Cognitive bias modification effectively reduced insomnia-consistent interpretation bias in students. However, this change did not improve pre-sleep worry or sleep quality, suggesting a complex role for interpretation bias in insomnia.

Keywords:
Cognitive biasInsomniaInterpretive biasSleepStudents

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Area of Science:

  • Psychology
  • Sleep Medicine
  • Cognitive Science

Background:

  • The cognitive model of insomnia highlights interpretation bias as a key factor.
  • Understanding the causal role of this bias is crucial for developing effective treatments.

Purpose of the Study:

  • To investigate the causal role of insomnia-consistent interpretation bias.
  • To modify this bias using Cognitive Bias Modification-Interpretation (CBM-I) in students with subclinical insomnia.
  • To assess the impact of bias modification on pre-sleep worry and sleep parameters.

Main Methods:

  • A randomized controlled trial involving 128 students with subclinical insomnia.
  • One group received online CBM-I, while the control group received sham training.
  • Interpretation bias was measured using an encoding-recognition task; sleep and worry were self-reported over seven days.

Main Results:

  • CBM-I successfully reduced insomnia-consistent interpretation bias compared to sham training.
  • Interpretation bias was eliminated post-training in the CBM-I group.
  • No significant improvements were observed in pre-sleep worry or any sleep parameters.

Conclusions:

  • Insomnia-consistent interpretation bias is modifiable through CBM-I.
  • The causal link between interpretation bias and insomnia symptoms is more complex than initially proposed.
  • Further research is needed to optimize cognitive bias modification techniques for insomnia treatment.