Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2025 Feb 19:2025:3566653.
doi: 10.1155/oti/3566653. eCollection 2025.

Effects of Lee Silverman Voice Treatment-BIG on Motor, Cognition, Mental Health, Occupational Performance, and Occupational Balance in Patients With Schizophrenia: A Single-Subject Experimental Study

Woo-Hyuk Jang  1 , Sang-Min Seo  2 , Si-Hyun Kim  3
Affiliations

Effects of Lee Silverman Voice Treatment-BIG on Motor, Cognition, Mental Health, Occupational Performance, and Occupational Balance in Patients With Schizophrenia: A Single-Subject Experimental Study

Woo-Hyuk Jang et al. Occup Ther Int. .

Abstract

Introduction: In this study, we aim to apply BIG to patients with schizophrenia to confirm changes in mental symptoms, task performance, and occupational balance through motor and cognitive enhancement. Method: This study used a single-subject A-B-A design. It consisted of a total of 22 sessions, with 4 sessions in the baseline period, 16 sessions in the intervention period (Lee Silverman Voice Treatment-BIG), and 2 sessions in the follow-up period. The subjects were three male patients diagnosed with chronic schizophrenia, all severe cases. During the 22 sessions, the timed up and go test (TUG) and functional reach test (FRT) and the Montreal Cognitive Assessment (MoCA) were used to determine changes in motor function and cognition, and the subjective cognitive and mental score (SS), Canadian Occupational Performance Measure (COPM), and Occupational Balance Questionnaire-Korean (OBQ-K) were used to determine changes in psychiatric symptoms, work performance, and work balance satisfaction before and after the intervention. Statistically significant changes were determined using the two standard deviation (2SD) band method. Results: The TUG, FRT, and MoCA showed significant results in the intervention period compared to the baseline period. The SS, COPM, and OBQ-K also showed positive changes in scores from pre- to postintervention. Conclusion: In this study, BIG was found to promote improvement in motor and cognitive function in chronic schizophrenia patients, with positive effects on psychiatric symptoms, task performance, and occupational balance satisfaction.

PubMed Disclaimer

Conflict of interest statement

The authors declare no conflicts of interest.

Figures

Figure 1
Figure 1
Study processing diagram. Abbreviation: LSVT: Lee Silverman Voice Treatment.
Figure 2
Figure 2
Changes in motor and cognitive function.
See this image and copyright information in PMC

Similar articles

See all similar articles

References

    1. Biedermann F., Fleischhacker W. W. Psychotic disorders in DSM-5 and ICD-11. CNS Spectrums . 2016;21(4):349–354. doi: 10.1017/S1092852916000316. - DOI - PubMed
    1. Correll C. U., Schooler N. R. Negative symptoms in schizophrenia: a review and clinical guide for recognition, assessment, and treatment. Neuropsychiatric Disease and Treatment . 2020;16:519–534. doi: 10.2147/NDT.S225643. - DOI - PMC - PubMed
    1. McGrath J., Saha S., Chant D., Welham J. Schizophrenia: a concise overview of incidence, prevalence, and mortality. Epidemiologic Reviews . 2008;30(1):67–76. doi: 10.1093/epirev/mxn001. - DOI - PubMed
    1. Faden J., Citrome L. Schizophrenia: one name, many different manifestations. Medical Clinics . 2023;107(1):61–72. doi: 10.1016/j.mcna.2022.05.005. - DOI - PubMed
    1. Moreno-Küstner B., Martín C., Pastor L. Prevalence of psychotic disorders and its association with methodological issues. A systematic review and meta-analyses. PLoS One . 2018;13(4) doi: 10.1371/journal.pone.0195687.e0195687 - DOI - PMC - PubMed

LinkOut - more resources