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Related Experiment Video

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The Mood Rhythm Instrument: development and preliminary report.

Camila M de Souza1,2, Alicia Carissimi1,2, Daniele Costa1

  • 1Laboratório de Cronobiologia, Hospital de Clínicas de Porto Alegre (HCPA), Universidade Federal do Rio Grande do Sul, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS , Brazil, Laboratório de Cronobiologia, Hospital de Clínicas de Porto Alegre (HCPA), Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil.

Revista Brasileira De Psiquiatria (Sao Paulo, Brazil : 1999)
|June 16, 2016
PubMed
Summary

Researchers developed the Mood Rhythm Instrument to assess daily mood symptom patterns. Initial validation shows it can detect individual mood rhythms, particularly somatic symptoms peaking in the morning.

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Area of Science:

  • Psychiatry
  • Chronobiology
  • Psychometrics

Background:

  • Mood disorders often exhibit daily rhythms in symptoms.
  • Assessing these rhythms is crucial for understanding and treating mood disturbances.
  • Existing instruments may not adequately capture the daily temporal patterns of mood symptoms.

Purpose of the Study:

  • To describe the initial development and validation of the Mood Rhythm Instrument (MRI).
  • To assess the instrument's ability to measure daily rhythms of mood symptoms.
  • To evaluate the clarity, relevance, and internal consistency of the MRI items.

Main Methods:

  • A multidisciplinary expert group systematically developed the instrument.
  • Item clarity, relevance to mood states, and consistency with biological evidence were assessed.
  • Internal consistency was evaluated using Cronbach's alpha.

Main Results:

  • Items related to somatic mood symptoms were rated as more rhythmic, with morning peaks.
  • Affective mood symptoms were less rhythmic, peaking in the afternoon/evening.
  • The second version of the Mood Rhythm Instrument achieved a Cronbach's alpha of 0.73.

Conclusions:

  • The Mood Rhythm Instrument shows potential for detecting individual rhythms in mood-related cognitive and behavioral measures.
  • Further validation in larger samples and against objective measures like actigraphy is recommended.
  • The instrument may aid in understanding the chronobiology of mood disorders.