The Emotional State Questionnaire (EST-Q)<\/strong> is a standardized, self-report screening instrument developed to assess symptoms of common mental disorders, specifically major depression, generalized anxiety, panic disorder, agoraphobia, asthenia or chronic fatigue, and primary sleep disturbances. Originally developed in Estonia by Anu Aluoja<\/a> and colleagues in 1999, the instrument was engineered to provide a rapid, psychometrically robust dimensional evaluation of affective and neurotic distress aligned with the diagnostic criteria of the International Classification of Diseases, Tenth Revision (ICD-10)<\/a> and the Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition (DSM-IV)<\/a>.<\/p>\n The questionnaire consists of 33 original screening items (with 28 to 31 primary scored items forming its core empirical subscales), evaluated along a 5-point Likert-type response scale ranging from 0 (“not at all”) to 4 (“all the time”), capturing symptom frequency over the preceding four weeks. The core empirical subscales comprise Depression<\/strong> (8 items), Anxiety<\/strong> (6 items), Agoraphobia\u2013Panic<\/strong> (5 items), Fatigue<\/strong> (5 items), and Insomnia<\/strong> (3 items). Across general population, primary care, and psychiatric inpatient samples, the EST-Q exhibits high internal consistency, with total scale Cronbach’s alpha coefficients typically reaching α = .88, and subscale alphas ranging from .69 for generalized anxiety to .87 for depression and .82 for agoraphobia-panic. Confirmatory and exploratory factor analyses substantiate a correlated five-factor structure that distinguishes general psychological distress from somatic exhaustion and situational phobic avoidance, demonstrating high sensitivity and specificity against structured diagnostic interviews such as the Mini-International Neuropsychiatric Interview (M.I.N.I.)<\/span>.<\/p>\n Emotional State Questionnaire, EST-Q, depression assessment, generalized anxiety, panic disorder, agoraphobia, fatigue, insomnia, psychometrics, screening scale<\/p>\n The Emotional State Questionnaire was developed and validated by a multidisciplinary team of psychiatrists and clinical psychologists from the Department of Psychiatry at the University of Tartu<\/a> and the National Institute for Health Development in Tallinn, Estonia:<\/p>\n The primary purpose of the Emotional State Questionnaire (EST-Q) is to provide clinicians, clinical researchers, and epidemiologists with a reliable, valid, and time-efficient dimensional measure of affective and anxiety symptomatology. Psychiatric epidemiology and general primary healthcare have long faced the challenge of detecting comorbid and subsyndromal presentations of mood and anxiety conditions. Patients frequently present in outpatient clinics with diffuse, nonspecific somatic complaints, such as persistent fatigue, muscular tension, gastrointestinal disruptions, and sleep architecture disruptions, without spontaneous reporting of depressed mood or cognitive anxiety.<\/p>\n Consequently, the EST-Q was engineered to serve several distinct clinical and scientific functions:<\/p>\n The EST-Q conceptualizes neurotic and affective suffering through a multidimensional matrix reflecting five interrelated symptom clusters:<\/p>\n The Depression subscale captures the cardinal cognitive, affective, and motivational markers of unipolar depressive pathology as formulated in contemporary psychiatric taxonomies. It targets depressed mood<\/em> (sadness), anhedonia<\/em> (the pervasive incapacity to experience pleasure or interest), feelings of worthlessness<\/em>, deliberate self-blame and self-accusation<\/em>, pathological loneliness<\/em>, pervasive hopelessness<\/em> regarding the future, and suicidal ideation or recurrent thoughts of death<\/em>. Rather than focusing primarily on secondary somatic manifestations, this dimension centers on the cognitive-affective core of depressive despair.<\/p>\n The Anxiety subscale measures state-trait manifestations of free-floating tension, apprehensive expectation, and autonomic hyperarousal. Items assess pervasive, excessive worry distributed across disparate life domains, inability to relax, acute somatic motor agitation (restlessness precluding sitting still), heightened startle response, subjective nervousness, and irritability. This construct delineates the persistent, anticipatory distress characteristic of Generalized Anxiety Disorder (GAD)<\/a>.<\/p>\n The Agoraphobia\u2013Panic subscale evaluates acute, paroxysmal autonomic surges alongside situational avoidance behaviors. It measures catastrophic visceral sensations (e.g., sudden attacks of panic marked by palpitations, dyspnea, faintness, and terrifying somatic feelings) coupled with contextual fears: entering open spaces or crowded streets, remaining home alone, traveling by public transportation or motor vehicles, and public fainting. It models the classical phobic-avoidant conditioning that emerges secondary to panic attacks.<\/p>\n Distinguishable from primary cognitive depression, the Fatigue dimension operationalizes persistent, pathological depletion of physical and mental vitality. It indexes subjective exhaustion, rapid fatiguability, psychomotor slowing, and the cardinal sign of unrefreshing rest (sleep that fails to restore strength). This separation is vital in separating chronic fatigue syndrome, medical asthenia, and post-viral states from purely cognitive depressive disorders.<\/p>\n The Insomnia dimension monitors disruptions across the biological sleep cycle, specifically addressing initial insomnia (difficulty falling asleep), middle insomnia (fragmented, restless, or disturbed nocturnal maintenance), and terminal insomnia (early-morning awakening with inability to return to sleep). Isolating sleep disturbances allows researchers to assess whether sleep disturbance is an isolated symptom or an integral component of a broader mood episode.<\/p>\n The theoretical architecture of the EST-Q rests upon the intersection of modern descriptive nosology (ICD-10<\/a> and DSM-IV<\/a>) and quantitative structural models of common mental disorders, most notably the Tripartite Model of Anxiety and Depression<\/strong> formulated by Clark and Watson (1991).<\/p>\n Historically, psychological measurement struggled with high cross-scale correlations between self-reported anxiety and depression inventories, such as the Beck Depression Inventory (BDI) and the State-Trait Anxiety Inventory (STAI). Clark and Watson’s tripartite framework postulated that:<\/p>\n Aluoja and colleagues designed the EST-Q to translate these dimensional boundaries into clinical assessment. By extracting distinct items for anhedonia and cognitive hopelessness (Depression), autonomic surges and situational avoidance (Agoraphobia\u2013Panic), generalized apprehension (Anxiety), and physical energy depletion (Fatigue), the EST-Q permits empirical verification of whether a patient’s suffering represents undifferentiated general distress or distinct syndrome-specific pathologies requiring different therapeutic approaches.<\/p>\n Validation studies of the EST-Q across primary care cohorts, psychiatric clinical samples, and representative general population registries have established sound psychometric properties:<\/p>\n Exploratory factor analyses (EFA) employing principal axis factoring with promax and varimax rotations, alongside Confirmatory Factor Analyses (CFA), have corroborated the theoretical multi-subscale structure. Rather than collapsing into a single general distress factor, goodness-of-fit indices support the correlated 5-factor model (Comparative Fit Index [CFI] > .92; Root Mean Square Error of Approximation [RMSEA] < .06), demonstrating clear empirical demarcation among depression, panic-agoraphobia, generalized anxiety, fatigue, and insomnia<\/span>.<\/p>\n The EST-Q subscales demonstrate robust convergent validity when benchmarked against established international psychometric scales:<\/p>\n Using Receiver Operating Characteristic (ROC)<\/a> analyses against structured psychiatric interviews (e.g., M.I.N.I. and SCAN), the EST-Q subscales demonstrate high diagnostic accuracy. In the original validation study by Aluoja et al. (1999):<\/p>\n The EST-Q displays consistent reliability profiles across research investigations and healthcare environments:<\/p>\n In the foundational psychometric study conducted by Aluoja et al. (1999) involving both general population cohorts (N<\/em> = 551) and psychiatric patients (N<\/em> = 122), internal consistency estimates (Cronbach’s α) were established as follows<\/span>:<\/p>\n Evaluation of test-retest reliability across non-clinical cohorts over a 2- to 4-week test-retest interval demonstrates high intraclass correlation coefficients (ICC = .80 to .86 for Depression; ICC = .74 to .81 for Anxiety and Panic). In clinical intervention trials, the scale exhibits high sensitivity to clinical change, reflecting significant score decrements among pharmacologically treated patients showing clinical remission<\/span>.<\/p>\n The original development of the EST-Q utilized exploratory factor analysis (EFA) on a pool of candidate items extracted from ICD-10 diagnostic guidelines. Principal component analysis followed by oblique rotation revealed a clear five-factor solution accounting for over 52% of the total variance:<\/p>\n Subsequent Confirmatory Factor Analyses (CFA) conducted on later revisions (such as the EST-Q-2) have substantiated the distinctiveness of these factors, confirming that a hierarchical structure (five first-order factors loading onto a higher-order general distress construct) or a correlated five-factor model achieves superior fit compared to single-factor unidimensional models.<\/p>\n The Emotional State Questionnaire (EST-Q) was published in 1999<\/strong> by Anu Aluoja, Jakov Shlik, Veiko Vasar, Kadri Luuk, and Mall Leinsalu in the Nordic Journal of Psychiatry<\/em>. The questionnaire was developed as a non-commercial, public-domain academic instrument to facilitate mental health screening, psychiatric epidemiology, and clinical care. It may be utilized freely for non-commercial academic research, healthcare screening, and clinical monitoring without licensing fees, provided proper attribution is given to the original authors and publication.<\/p>\n Instructions:<\/strong> Please indicate how much each of the following complaints has troubled you during the past four weeks, using the scale below:<\/p>\n Response scale:<\/strong> A comprehensive academic guide to the Emotional State Questionnaire (EST-Q), detailing its psychometric properties, subscales (Depression, Anxiety, Agoraphobia-Panic, Fatigue, and Insomnia), scoring guidelines, and full items.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","template":"","categories":[66,13178,2],"tags":[1534,2233,73,13179,1800,1318,1533,6],"class_list":["post-3690","psych_scale","type-psych_scale","status-publish","hentry","category-clinical-psychology","category-mental-health-screening","category-psychometrics","tag-agoraphobia","tag-anxiety","tag-depression","tag-est-q","tag-fatigue","tag-insomnia","tag-panic-disorder","tag-psychometrics"],"_links":{"self":[{"href":"https:\/\/ashadocs.org\/index.php?rest_route=\/wp\/v2\/psych_scale\/3690","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ashadocs.org\/index.php?rest_route=\/wp\/v2\/psych_scale"}],"about":[{"href":"https:\/\/ashadocs.org\/index.php?rest_route=\/wp\/v2\/types\/psych_scale"}],"author":[{"embeddable":true,"href":"https:\/\/ashadocs.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ashadocs.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3690"}],"version-history":[{"count":0,"href":"https:\/\/ashadocs.org\/index.php?rest_route=\/wp\/v2\/psych_scale\/3690\/revisions"}],"wp:attachment":[{"href":"https:\/\/ashadocs.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3690"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ashadocs.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3690"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ashadocs.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3690"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}Keywords<\/h2>\n
Authors<\/h2>\n
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Purpose<\/h2>\n
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Psychological Construct<\/h2>\n
1. Depression<\/h3>\n
2. Generalized Anxiety<\/h3>\n
3. Agoraphobia\u2013Panic<\/h3>\n
4. Asthenia \/ Fatigue<\/h3>\n
5. Insomnia<\/h3>\n
Theoretical Framework<\/h2>\n
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Validity<\/h2>\n
Construct and Factorial Validity<\/h3>\n
Convergent and Discriminant Validity<\/h3>\n
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Criterion and Diagnostic Predictive Validity<\/h3>\n
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Reliability<\/h2>\n
Internal Consistency<\/h3>\n
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Test-Retest Stability<\/h3>\n
Factor Analysis<\/h2>\n
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Instrument \/ Measurement Tool<\/h2>\n
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Permissions & Fee and Test Year<\/h2>\n
References<\/h2>\n
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Items of the Scale<\/h2>\n
\n 0 = not at all<\/span>
\n 1 = seldom<\/span>
\n 2 = sometimes<\/span>
\n 3 = often<\/span>
\n 4 = all the time<\/span><\/p>\n\n