For the visually impaired (VI), independent mobility (IM) refers to their ability to move around safely indoors and outdoors without peer assistance. The Independent Mobility Questionnaire (IMQ) has been extensively used to evaluate self-perceived IM. The current study aims to assess the psychometric properties of the Romanian version of the IMQ (IMQ-R) by using a sample of 199 VI (of which 35.9% were blind), who self-administered the scale as part of an online survey in February and November 2023. The IMQ-R showed excellent internal consistency, validity, and test-retest reliability, intraclass correlation coefficient of .908, 95% confidence interval from .850 to .944, F(65,65)= 10.932, p=.000. In linear regression, the predictors of poor IM scores were consistent with the literature and included older age, poorer mental health status, and social isolation. This scale could be used by rehabilitation professionals to assess independent mobility levels in VI and by researchers as a patient-reported outcome, to evaluate the effectiveness of independent mobility devices targeted at VI.
AlswailmiF. K. (2018). Global prevalence and causes of visual impairment with special reference to the general population of Saudi Arabia. Pakistan Journal of Medical Sciences, 34(3), 751–756. https://doi.org/10.12669/pjms.343.14510
BohanD. B.Tuck Wah JamesC. (2015). Mobility of a guide dog team in Singapore: A case study. British Journal of Visual Impairment, 33(1), 54–65. https://doi.org/10.1177/0264619614561691
5.
BrunesA.FalkenbergH. K.BerndtssonI. C.HeirT. (2024). Use and underuse of mobility aids in individuals with visual impairment: A cross-sectional study of a Norwegian sample. Disability and Rehabilitation: Assistive Technology, 19(2), 266–272. https://doi.org/10.1080/17483107.2022.2081735
6.
CampisiT.IgnaccoloM.InturriG.TesoriereG.TorrisiV. (2021). Evaluation of walkability and mobility requirements of visually impaired people in urban spaces. Research in Transportation Business & Management, 40, 100592. https://doi.org/10.1016/j.rtbm.2020.100592
7.
ChananaP.PaulR.BalakrishnanM.RaoP. V. M. (2017). Assistive technology solutions for aiding travel of pedestrians with visual impairment. Journal of Rehabilitation and Assistive Technologies Engineering, 4, 2055668317725993. https://doi.org/10.1177/2055668317725993
8.
Darc Piculo dos SantosA.SuzukiA.MedolaF.VaezipourA. (2021). A systematic review of wearable devices for orientation and mobility of adults with visual impairment and blindness. IEEE Access, 9, 162306–162324. https://doi.org/10.1109/ACCESS.2021.3132887
De VetH. C. W.TerweeC. B.MokkinkL. B.KnolD. L. (2017). Measurement in medicine: A practical guide (2nd ed.). Cambridge University Press.
11.
EhrlichJ. R.SpaethG. L.CarlozziN. E.LeeP. P. (2017). Patient-centered outcome measures to assess functioning in randomized controlled trials of low-vision rehabilitation: A review. The Patient, 10(1), 39–49. https://doi.org/10.1007/s40271-016-0189-5
12.
FenwickE. K.O’HareF.DeverellL.AytonL. N.LuuC. D.McSweeneyS.BentleyS. A.GuymerR. H.FingerR. P. (2016). Rasch analysis of the Independent Mobility Questionnaire. Optometry and Vision Science: Official Publication of the American Academy of Optometry, 93(2), 181–187. https://doi.org/10.1097/OPX.0000000000000787
13.
GitlinL. N.MountJ.LucasW.WeirichL. C.GrambergL. (1997). The physical costs and psychosocial benefits of travel aids for persons who are visually impaired or blind. Journal of Visual Impairment and Blindness, 91(4), 347–359. https://doi.org/10.1177/0145482X9709100404
14.
GolledgeR. G. (1993). Geography and the disabled: A survey with special reference to vision impaired and blind populations. Transactions of the Institute of British Geographers, 18(1), 63–85. https://doi.org/10.2307/623069
15.
HaileamlakA. (2022). The burden of visual impairment and efforts to curve it down. Ethiopian Journal of Health Sciences, 32(5), 874. https://doi.org/10.4314/ejhs.v32i5.1
16.
HepworthL. R.RoweF. J.BurnsideG. (2019). Development of a patient reported outcome measures for measuring the impact of visual impairment following stroke. BMC Health Services Research, 19(1), Article 348. https://doi.org/10.1186/s12913-019-4157-3
17.
HepworthL. R.RoweF. J.HarperR.JarvisK.ShipmanT.RodgersH. (2015). Patient reported outcome measures for visual impairment after stroke: A systematic review. Health and Quality of Life Outcomes, 13(1), 146. https://doi.org/10.1186/s12955-015-0338-x
18.
HoogsteenK. M. P.SzpiroS.KreimanG.PeliE. (2022). Beyond the cane: Describing urban scenes to blind people for mobility tasks. ACM Transactions on Accessible Computing, 15(3), 20. https://doi.org/10.1145/3522757
19.
KoğarH. (2020). Development of a short form: Methods, examinations, and recommendations. Eğitimde ve Psikolojide Ölçme ve Değerlendirme Dergisi, 11, 301–310. https://doi.org/10.21031/epod.739548
20.
KooT. K.LiM. Y. (2016). A guideline of selecting and reporting intraclass correlation coefficients for reliability research. Journal of Chiropractic Medicine, 15(2), 155–163. https://doi.org/10.1016/j.jcm.2016.02.012
21.
LeeS.ReddieM.CarrollJ. M. (2021). Designing for Independence for people with visual impairments. Proceedings of the ACM on Human-Computer Interaction, 5(CSCW1), 1–19. https://doi.org/10.1145/3449223
22.
LethbridgeE. M.MuldoonC. (2018). Development of a mobility-related quality-of-life measure for individuals with vision impairments. Journal of Visual Impairment & Blindness, 112(2), 169–181. https://doi.org/10.1177/0145482X1811200205
23.
LloydJ. K.BudgeR. C.StaffordK. J.La GrowS. J. (2009). A focus group discussion on using guide dogs. Vision Rehabilitation International, 2(1), 52–64. https://doi.org/10.21307/ijom-2009-005
24.
LloydJ. K.La GrowS.StaffordK. J.BudgeR. C. (2008). The guide dog as a mobility aid part 2: Perceived changes to travel habits. Vision Rehabilitation International, 1(1), 34–45. https://doi.org/10.21307/ijom-2008-004
25.
LöweB.WahlI.RoseM.SpitzerC.GlaesmerH.WingenfeldK.SchneiderA.BrählerE. (2010). A 4-item measure of depression and anxiety: Validation and standardization of the Patient Health Questionnaire-4 (PHQ-4) in the general population. Journal of Affective Disorders, 122(1–2), 86–95. https://doi.org/10.1016/j.jad.2009.06.019
ManirajeeL.RashidS. M. M.ShariffS. Q. H. (2024). Assistive technology for visually impaired individuals: A Systematic Literature Review (SLR). International Journal of Academic Research in Business and Social Sciences, 14(2), 20827. http://dx.doi.org/10.6007/IJARBSS/v14-i2/20827
29.
MashiataM.AliT.DasP.TasneemZ.BadalM. F. R.SarkerS. K.HasanM.AbhiS. H.IslamR.AliF.AhamedH.IslamM.DasS. K. (2022). Towards assisting visually impaired individuals: A review on current status and future prospects. Biosensors and Bioelectronics: X, 12, 100265. https://doi.org/10.1016/j.biosx.2022.100265
30.
Mašić FabacV.SikirićD. (2023, May12). Correlation between visually impaired persons emotional distress and frequency in independent everyday mobility and attitudes towards epidemiological guidelines in mobility. https://www.dpublication.com/wp-content/uploads/2022/01/4121-619.pdf
MuneneM.MaianaS. M. (2019). Caregivers as Aids to People With Visual Mobility Disability in Interior Spaces in Kenya.
34.
National Academies of Sciences, Engineering, and Medicine; Health and Medicine Division; Board on Population Health and Public Health Practice; Committee on Public Health Approaches to Reduce Vision Impairment and Promote Eye Health; WelpA.WoodburyR. B.McCoyM. A.TeutschS. M. (2016). The impact of vision loss. In WelpA.WoodburyR. B.McCoyM. A.TeutschS. M. (Eds), Making eye health a population health imperative: Vision for tomorrow (pp. 135–162). National Academies Press. https://www.ncbi.nlm.nih.gov/books/NBK402367/
35.
OsborneJ.CostelloA. (2019). Sample size and subject to item ratio in principal components analysis. Practical Assessment, Research, and Evaluation, 9(1), 11. https://doi.org/10.7275/ktzq-jq66
36.
RicklyJ. M.HalpernN.HansenM.WelsmanJ. (2022). Traveling with a guide dog: Confidence, constraints and affective qualities of the human-guide dog relationship. Tourism Management, 93, 104617. https://doi.org/10.1016/j.tourman.2022.104617
37.
RůžičkováV. (2019). Spatial orientation of people with visual impairment. In BesedováP.HeinrichováN.OndrákováJ. (Eds.), ICEEPSY 2019: Education and educational psychology, vol 72. European proceedings of social and behavioural sciences (pp. 721–730). Future Academy. https://doi.org/10.15405/epsbs.2019.11.81
38.
SeetharamanK.MahmoodA.RikhtehgaranF.AkbarnejadG.ChishtieF.PrescottM.ChungA.MortensonW. B. (2024). Influence of the built environment on community mobility of people living with visual disabilities: A scoping review. Urban, Planning and Transport Research, 12(1), 2296891. https://doi.org/10.1080/21650020.2023.2296891
39.
SwenorB. K.LeeM. J.VaradarajV.WhitsonH. E.RamuluP. Y. (2020). Aging with vision loss: A framework for assessing the impact of visual impairment on older adults. The Gerontologist, 60(6), 989–995. https://doi.org/10.1093/geront/gnz117
40.
SwenorB. K.SimonsickE. M.FerrucciL.NewmanA. B.RubinS.WilsonV. (2015). Visual impairment and incident mobility limitations: The health ABC study. Journal of the American Geriatrics Society, 63(1), 46–54. https://doi.org/10.1111/jgs.13183
41.
TerweeC. B.BotS. D.de BoerM. R.van der WindtD. A.KnolD. L.DekkerJ.BouterL. M.de VetH. C. (2007). Quality criteria were proposed for measurement properties of health status questionnaires. Journal of Clinical Epidemiology, 60(1), 34–42. https://doi.org/10.1016/j.jclinepi.2006.03.012
42.
TuranoK. A.GeruschatD. R.StahlJ. W.MassofR. W. (1999). Perceived visual ability for independent mobility in persons with retinitis pigmentosa. Investigative Ophthalmology & Visual Science, 40(5), 865–877. https://pubmed.ncbi.nlm.nih.gov/10102283/
43.
U.S. Department of Health and Human Services FDA Center for Drug Evaluation and Research, U.S. Department of Health and Human Services FDA Center for Biologics Evaluation and Research, & U.S. Department of Health and Human Services FDA Center for Devices and Radiological Health. (2006). Guidance for industry: Patient-reported outcome measures: Use in medical product development to support labeling claims: Draft guidance. Health and Quality of Life Outcomes, 4, 79. https://doi.org/10.1186/1477-7525-4-79
44.
WongS. (2018). Traveling with blindness: A qualitative space-time approach to understanding visual impairment and urban mobility. Health & Place, 49, 85–92. https://doi.org/10.1016/j.healthplace.2017.11.009
