Instruments & Measures

Published Research & Citations

IndoPsyCare endeavours to continue conducting research into the latest evidence-based psychological treatments and remain up-to-date on psychological phenomena and breakthroughs.

We are proud to present the research conducted, or contributed to, by our advisors and IndoPsyCare psychologists. We seek to emphasize that whilst members of our team have contributed to these papers, we do not claim rights nor ownership of these publications.

• Kugler, D., Ascone, L., Pohlmann, K., Weichenberger, M., & Kuehn, S. (2022). Construct Validation of a German Version of the Word Completion Task for Aggression. doi: 10.31234/osf.io/3dh5r

  Abstract:
  “Background: The Word Completion Task (WCT) is widely used to assess implicit aggressive cognition. This study formally validated a German version and developed an improved scoring algorithm that accounts for alternative solution options and word frequencies.
  
  Findings: WCT scores demonstrated significant construct validity with validated aggression instruments (Buss-Perry Questionnaire; Rosenzweig Picture Frustration Test) when using the refined scoring algorithm.
  
  Conclusion: Establishes the psychometric validity of the WCT as an objective implicit measure of trait aggressive cognition in psychological and clinical research.”



• Hudiyana, J., Lincoln, T. M., Hartanto, S., Shadiqi, M. A., Milla, M. N., Muluk, H., & Jaya, E. S. (2021). How Universal Is a Construct of Loneliness? Measurement Invariance of the UCLA Loneliness Scale in Indonesia, Germany, and the United States. Assessment. doi: 10.1177/10731911211034564

  Abstract:
  “Background: Evaluated the cross-cultural measurement invariance of the UCLA Loneliness Scale in Germany, Indonesia, and the United States (N = 2,350).
  
  Findings: The refined 6-item version (ULS-6) satisfied strict scalar measurement invariance across all three countries, isolating core social isolation without cultural phrasing bias.
  
  Conclusion: Recommends the ULS-6 for reliable, culturally unbiased assessments of loneliness in international health and psychiatric research.”



• Jaya, E. S.*, Amelsvoort, T. van, Bartels-Velthuis, A. A., Bruggeman, R., Cahn, W., Haan, L. de, Kahn, R. S., Os, J. van, Schirmbeck, F., Simons, C. J. P., & Lincoln, T. M. (2021). The Community Assessment of Psychic Experiences: Optimal cut-off scores for detecting individuals with a psychotic disorder. International Journal of Methods in Psychiatric Research, e1893. doi: 10.1002/mpr.1893

  Abstract:
  “Objectives: Established optimal diagnostic cut-off thresholds for the Community Assessment of Psychic Experiences (CAPE) self-report screener in a case-control sample of 1,375 participants (868 psychotic disorder cases; 507 healthy controls).
  
  Findings: The weighted positive symptom dimension with a cut-off score of >1.75 demonstrated superior diagnostic power (AUC = 0.88; 75% sensitivity; 88% specificity), correctly classifying 80% of individuals with an odds ratio of 22.69.
  
  Conclusion: Establishes the first standardized clinical cut-off score for the CAPE, enabling rapid and reliable preliminary screening for clinical psychosis risk.”



• Jaya, E. S.*, Wüsten, C., Alizadeh, B. Z., Amelsvoort, T. van, Bartels-Velthuis, A. A., Beveren, N. J. van, Bruggeman, R., Cahn, W., Haan, L. de, Delespaul, P., Luykx, J. J., Myin-Germeys, I., Kahn, R. S., Schirmbeck, F., Simons, C. J. P., Haren, N. E. van, Os, J. van, Winkel, R. van, Fonseca-Pedrero, E., … Lincoln, T. M. (2020). Comparing psychotic experiences in low-and-middle-income-countries and high-income-countries with a focus on measurement invariance. Psychological Medicine, 1–8. doi: 10.1017/S0033291720003323

  Abstract:
  “Background: Tested the measurement invariance of the CAPE across 13 countries (7,141 participants) from low-and-middle-income and high-income regions.
  
  Findings: Confirmatory factor analysis supported partial scalar invariance. Sum score comparisons in prior studies were shown to produce systematic measurement bias; latent score adjustments confirmed higher positive experiences but lower avolition in developing nations.
  
  Conclusion: Validates the cross-national factor structure of the CAPE while establishing statistical adjustments required for unbiased global comparisons.”



• Ascone, L., Uppenkamp, S., Behler, O., Lineton, B., Burke, E., Koch, C., Kühn, S., & Geršak, G. (2019). Deductive development and validation of a questionnaire to assess sensitivity to very low and very high frequency sounds: SISUS-Q (Sensitivity to Infra-Sound and Ultra-Sound Questionnaire). Noise & Health, 21(101), 173–182. doi: 10.4103/nah.NAH_46_19

  Abstract:
  “Objective: Developed and psychometrically validated the SISUS-Q questionnaire to evaluate individual sensory and somatic sensitivity to infrasound and ultrasound across European cohorts.
  
  Findings: Identified distinct factors for infrasound vs. ultrasound sensitivity comprising sensory perception, stress reactivity, and avoidance behavior, accounting for 72% of the variance with high reliability.
  
  Conclusion: Provides the first validated psychometric instrument for researching somatic complaints and health impacts related to inaudible environmental acoustics.”



• Jaya, E. S.* (2017). Confirmatory factor analysis of the Indonesian version of Community Assessment of Psychic Experiences. Makara Human Behavior Studies in Asia, 9(1), 1–12. doi: 10.7454/mssh.v21i1.3495

  Abstract:
  “Background: Validated the Indonesian translation of the Community Assessment of Psychic Experiences (CAPE) in a cross-sectional community sample of 844 participants.
  
  Findings: Confirmatory factor analysis demonstrated that the 9-dimensional subscale model (bizarre experiences, hallucinations, paranoia, grandiosity, magical thinking, social withdrawal, affective flattening, avolition, and depressive symptoms) showed excellent fit in Indonesia.
  
  Conclusion: Confirms the psychometric validity of the Indonesian CAPE for mental health research and clinical screening in Indonesian clinical and community settings.”