Internal consistency of the Seasonal Pattern Assessment Questionnaire (SPAQ).

Magnusson, Andres; Friis, Svein; Opjordsmoen, Stein

doi:10.1016/s0165-0327(96)00104-8

Cited by 73Circadian rhythm and melatoninPsychometric Methodologies and TestingSleep and related disorders

Internal consistency of the Seasonal Pattern Assessment Questionnaire (SPAQ).

Magnusson, Andres, Friis, Svein, Opjordsmoen, Stein·1997·Journal of Affective Disorders

DOI 10.1016/s0165-0327(96)00104-8

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Abstract

We examined the consistency reliability of the widely used Seasonal Pattern Assessment Questionnaire (SPAQ). In total, 587 questionnaires from a random sample of the general population were analysed. The 6 items of the Seasonality Scale Index (SSI) correlated fairly well, and consequently this scale proved to have a high internal consistency (alpha = 0.82). Items from the SSI that measure seasonal variations in sleep and weight were consistent with other SPAQ scales that also measure these dimensions. Since the questionnaires analysed were from an epidemiological study, the high consistency reliability shows that the symptoms probed for by the SSI, tend to cluster in susceptible individuals in the general population.

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The questionnaire has high internal consistency.
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From Seasonal changes in mood and behavior are linked to metabolic syndrome (2008) · cites this paper as [63]

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Authors: Magnusson, A., Friis, S., & Opjordsmoen, S.
Affiliations: Oslo University Hospital (NO)
ORCID: Friis, Svein
Venue: Journal of Affective Disorders
Publisher: Elsevier BV
Published: 1997-02
Volume: 42
Issue: 2-3
Pages: 113-116
ISSN: 0165-0327 (ISSN-L)
DOI: 10.1016/s0165-0327(96)00104-8
OpenAlex: W2040456934
Cited by: 73
References: 5
Citations by year: 2026: 2 · 2025: 2 · 2024: 3 · 2022: 3 · 2021: 4 · 2020: 1 · 2019: 1 · 2017: 2 · 2016: 3 · 2015: 3 · 2014: 1 · 2013: 6 · 2012: 2
FWCI: 0.55
Type: journal article
Language: en
Open access: closed
Licence: www.elsevier.com/tdm/userlicense/1.0/ (tdm)
Locations: Journal of Affective Disorders (publishedVersion)
PubMed (publishedVersion)
Topics: Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
Social Sciences › Decision Sciences › Management Science and Operations Research › Psychometric Methodologies and Testing
Social Sciences › Psychology › Experimental and Cognitive Psychology › Sleep and related disorders
Keywords: Seasonal Pattern Assessment Questionnaire, internal consistency, reliability statistics, seasonal variation, sleep, weight, general population, seasonal affective disorder, questionnaire validation
MeSH terms: Adolescent, Adult, Aged, Female, Humans, Iceland, Male, Middle Aged, Personality Assessment, Psychometrics, Seasons, Reproducibility of Results, Seasonal Affective Disorder

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