Unitary Measure Research Articles

Feasibility of measuring eye–hand coordination in children with developmental delay using Sanet Vision Integrator

Eye–hand coordination is a visuomotor task that enables one to look, localize, and touch objects. Eye–hand coordination is known to be poor in children with developmental delay. In this study, we assessed the feasibility of measuring eye–hand coordination task in children with developmental delay using Sanet Vision Integrator (SVI), a commercially available device. Children (age: 3–16 years) with developmental delay and their age-similar typically developing peers were enrolled. White circles (5.5°) on a black background were presented on the SVI touch screen monitor. Participants popped these circles by touching it. Reaction time, accuracy, and an overall performance score were computed. Participants could perform the task from 4 years of age and with visual acuity 20/400 (6/120) or better. This resulted in 85% (17/20) of children with developmental delay and 95% (19/20) of typically developing children completing the task. Children with developmental delay were significantly ( p < .001) less accurate (56%) and took longer (2.63 s) to complete the task when compared with their peers (accuracy = 93%, reaction time = 1.46 s). The overall performance score of children with developmental delay was also lower than their peers by a factor of 3.3. Eye–hand coordination performance can be measured and quantified with SVI. The quantification of speed and accuracy is possible and a unitary measure combining speed-accuracy can be computed. The task can be performed both by typically developing children and by children with developmental delay. Thus, it is feasible to measure eye–hand coordination using SVI. Such quantification will be useful for children undergoing interdisciplinary therapies for their medical conditions.

Assessing the state of Web-based communication for public health: a systematic review

Abstract Background Communicating strategically is a key issue for health organisations and, over the past decade, healthcare communication via social media and websites has generated a great deal of studies. As for systematic reviews, there is, however, fragmentary evidence on this type of communication. The aim of this research was to summarise the evidence on Web institutional health communication for public health authorities to evaluate aim-specific key points based on existing studies. Methods Guided by the PRISMA statement, we conducted a comprehensive review across two electronic databases (PubMed and Web of Science) from 2011 until 7 October 2021, searching for studies investigating institutional health communication. Two independent researchers reviewed the articles for inclusion, and assessment of methodological quality was based on the Kmet appraisal checklist. Results 78 articles were selected. Most of the studies targeted health promotion/disease prevention (n = 35), followed by crisis communication (n = 24), general health (n = 13), and misinformation correction/health promotion (n = 6). Engagement and message framing were the most analysed aspects. Few studies focused on campaign effectiveness. Only 18 studies had an experimental design. Kmet evaluation was used to distinguish studies presenting a solid structure from lacking studies. In particular, considering the 0·75-point threshold, out of 74 studies, 28 were excluded (37·8% of the total). Studies above this threshold were used to identify a series of aim-specific and medium-specific suggestions, as communication strategies employed differ quite greatly. Conclusions Overall, findings suggest that no single strategy works best in the case of Web-based healthcare communication. The extreme variability of outcomes and the lack of a unitary measure for assessing the end-points of a specific campaign or study leads us to reconsider the tools we use to evaluate the efficacy of Web-based health communication. Key messages

Evaluating the Effectiveness of Internet-Based Communication for Public Health: Systematic Review.

BackgroundCommunicating strategically is a key issue for health organizations. Over the past decade, health care communication via social media and websites has generated a great deal of studies examining different realities of communication strategies. However, when it comes to systematic reviews, there is fragmentary evidence on this type of communication.ObjectiveThe aim of this systematic review was to summarize the evidence on web institutional health communication for public health authorities to evaluate possible aim-specific key points based on these existing studies.MethodsGuided by the PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) statement, we conducted a comprehensive review across 2 electronic databases (PubMed and Web of Science) from January 1, 2011, to October 7, 2021, searching for studies investigating institutional health communication. In total, 2 independent researchers (AN and SS) reviewed the articles for inclusion, and the assessment of methodological quality was based on the Kmet appraisal checklist.ResultsA total of 78 articles were selected. Most studies (35/78, 45%) targeted health promotion and disease prevention, followed by crisis communication (24/78, 31%), general health (13/78, 17%), and misinformation correction and health promotion (6/78, 8%). Engagement and message framing were the most analyzed aspects. Few studies (14/78, 18%) focused on campaign effectiveness. Only 23% (18/78) of the studies had an experimental design. The Kmet evaluation was used to distinguish studies presenting a solid structure from lacking studies. In particular, considering the 0.75-point threshold, 36% (28/78) of the studies were excluded. Studies above this threshold were used to identify a series of aim-specific and medium-specific suggestions as the communication strategies used differed greatly.ConclusionsOverall, the findings suggest that no single strategy works best in the case of web-based health care communication. The extreme variability of outcomes and the lack of a unitary measure for assessing the end points of a specific campaign or study lead us to reconsider the tools we use to evaluate the efficacy of web-based health communication.

The National Aviation and Space Agency Task Load Index (NASA-TLX): Does it Need Updating?

The NASA-TLX is arguably the most widely used self-report measure of workload in the field of Human Factors and Ergonomics. Previous research utilizing factor analysis has indicated it may not actually be a good unitary measure of workload. In the present study, we have modified two of the original six items, Frustration and Performance, to better reflect workload by replacing them with Emotional Demand and Performance Monitoring Demand items. Confirmatory factor analyses indicate the new scale is an improvement but Physical Demand should also be considered for removal; this results in a five-item measure of mental workload, not overall task workload, as physical demands may not be meaningfully combinable with cognitive demands.

An investigation of technology trust and habit in IT use continuance: a study of a social network

PurposeSocial networking services/systems (SNSs) have grown in popularity in the past decade. However, while some have been abandoned by their once loyal users, others have grown in popularity. Literature provides diverse and often conflicting justifications for this phenomenon. Seeking a credible explanation, this study aims to examine the roles of system-like trust and habit in SNS use continuance.Design/methodology/approachThis study conducted a comprehensive review of related literature to formulate an extended model of information technology (IT) continuance. A cross-sectional field survey was used to collect data from 401 university-student Facebook users. The research model was evaluated using structural equation modeling.FindingsThe results indicate that trust in technology and hedonic motivation are important direct influences on end-user continuance intention (CI), while habit is not. Interestingly, the most salient (indirect) predictor of CI is confirmation of (user) expectations.Practical implicationsThe study suggests a set of practical steps that managers and practitioners can undertake to support users’ decisions to continue using the systems.Originality/valueThis paper advances IT continuance research by theorizing that trust in technology along with habit and hedonic motivation positively influence CI. In addition, the study enhances the concept of perceived usefulness by modeling this unitary measure as a multidimensional construct.

An exploration of the relationships of experiential avoidance (as measured by the aaq-ii and meaq) with negative affect, perceived stress, and avoidant coping styles.

BackgroundCurrent psychotherapies seek to reduce experiential avoidance (EA) which has also been put forth as a risk factor for anxiety disorders, depression, and post-traumatic stress disorder. EA is a potentially maladaptive self-regulatory tendency to avoid negative thoughts, feelings, memories, physical sensations, and other internal experiences. One unresolved issue with the most commonly used measures of EA, the Acceptance and Action Questionnaire-II (AAQ-II) which measures EA as a single factor and the Multidimensional Experiential Avoidance Questionnaire (MEAQ) which measures EA as six subdimensions, is what exactly is being measured. The AAQ-II appears to measure negative affect (NA), some aspects of avoidant coping, and psychological distress. In addition, the relationships of all the MEAQ subscales have not been thoroughly examined with these other constructs. In the current study, the relationships of AAQ-II and MEAQ scores with NA, avoidant coping styles, and perceived stress were examined.MethodsTwo-hundred undergraduates (154 females and 46 males) completed the AAQ-II and MEAQ, the Distressed Type D Personality Scale (DS-14) which includes a measure of NA, the Brief COPE which measures coping styles, and the Perceived Stress Scale.ResultsScores on the AAQ-II had moderate positive relationships with the MEAQ total score and all MEAQ subscales with the exception of distress endurance which had a moderate negative relationship. The AAQ-II had a stronger relationship with NA, avoidant coping, and perceived stress than did the MEAQ. All MEAQ subscales had a positive relationship to NA, avoidant coping, and perceived stress with the exception of distress endurance which had a negative relationship with these constructs. While the AAQ-II is limited as a unitary measure of EA the multiple dimensions of the MEAQ may involve an extraneous factor of distress endurance. Future work should examine the relationships of the MEAQ with NA, avoidant coping and perceived stress with clinical populations.

Does Social Capital Affect Voter Turnout? Evidence from Italy

In this paper we develop a new composite indicator, named Social Catalyst, able to account for the complex and multifaceted nature of the social capital in a unitary measure. We use our indicator, as well as its components, to explore the relation between social capital and electoral participation in the parliamentary elections in Italy from 1994 to 2008, addressing the potential endogeneity bias. Our findings show that (i) the Social Catalyst positively and significantly affects voter turnout in both Chambers; (ii) among the different dimensions of social capital, social norms and associational networks play a prominent role in the Italian regional context.

Multidimensional Apathy: The Utility of the Dimensional Apathy Scale in Huntington's Disease.

Apathy is a disorder of motivation common to Huntington's disease (HD). Recent conceptual frameworks suggest that apathy is not unitary but consists of discrete subtypes ("dimensions"). Which of the proposed dimensions are preferentially affected in HD, and how these dimensions evolve with disease progression is unknown. The Dimensional Apathy Scale (DAS) separates apathy into Executive, Initiation and Emotional subscales. Using the DAS, we aimed to: 1) Determine the apathy subtypes prevalent in HD; 2) Compare the DAS against a unitary measure of apathy (Apathy Evaluation Scale, AES); 3) Assess the reliability of self- and observer-ratings; and 4) Determine the relationship between the DAS, and disease burden, total functional capacity (TFC) and the AES. Fifty pre-manifest, 51 manifest-HD, 87 controls, and 50 HD-observers completed the DAS, AES, and TFC. Manifest-HD participants had the highest levels of apathy across all dimensions (30.4% on Executive subscale, 34.8% on Initiation subscale, and 15.2% on Emotional subscale), relative to pre-manifest and control participants. Self- and observer-ratings on the DAS did not differ. Hierarchical regressions across the entire gene-expanded sample showed that scores on the Initiation subscale correlated with AES scores; higher Executive subscale scores were related to higher disease burden; and Emotional subscale scores with lower total functional capacity. In this first study of the DAS in HD, manifest-HD participants were more apathetic than pre-manifest and control participants across all apathy subtypes. The DAS may be a useful tool for measuring different aspects of apathy in people with HD.

Psychometric examination of care quality measures in VA psychosocial rehabilitation and recovery centers (PRRCs).

The Veterans Health Administration (VHA) developed Psychosocial Rehabilitation and Recovery Centers (PRRCs) to enhance recovery-oriented mental health services to large populations of veterans diagnosed with serious mental illness (e.g., psychotic disorders, bipolar disorder) and significant functional challenges. Psychosocial Rehabilitation and Recovery Centers were designed to support a rehabilitation framework to help veterans obtain needed skills and support to integrate into meaningful, self-determined community roles. This study used data collected as part of VHA's development and implementation of a national system to monitor PRRC performance with the purpose of evaluating the psychometric properties and latent structure of outcome measures used in PRRCs. Baseline self-report data from 5,086 veterans and their assigned PRRC staff providers were collected and reviewed. Exploratory factor analyses were used to evaluate the psychometric properties of the Veteran-Rated Psychiatric Symptom Items (VR-PSI), the Clinician-Rated Psychiatric Symptom Items (CR-PSI), and the Internalized Stigma of Mental Illness 10-item scale (ISMI-10). Four latent factors were identified for the VR-PSI and CR-PSI for the total sample, while the ISMI-10 was reduced to 8-items to assess self-stigma as a unitary measure. All measures demonstrated good psychometric properties. This study provides initial support for the latent factor structures and psychometric properties of measures used to assess national VHA PRRC performance. Implications and limitations are discussed. (PsycInfo Database Record (c) 2020 APA, all rights reserved).

Linguistic entrenchment and the effect of subjective lexical familiarity in Korean /n/-insertion

Korean shows variable /n/-insertion between a morpheme-final consonant and the initial /i/ or /j/ of a following morpheme. Literature has shown that the appearance of the phenomenon can be affected by various parameters, including social and phonological factors. Exemplar theory contends that a word’s susceptibility to language variation correlates directly with its word frequency, a unitary frequency measure based on a corpus (Pierrehumbert 2001; Bybee 2002). However, given that individuals have different language experience, word frequency rarely addresses individual differences in the same way that self-rated measures of word frequency, known as subjective lexical familiarity, do. This research investigates whether and how the metric of self-rated lexical familiarity affects Korean /n/-insertion. Results indicate that subjective lexical familiarity significantly predicts the appearance of /n/-insertion, such that words more familiar to the speaker show /n/-insertion more often than those that are less familiar.

Factors emerging from the "Zarit Burden Interview" and predictive variables in a UK sample of caregivers for people with dementia - CORRIGENDUM.

ABSTRACTBackground:Caring for persons with dementia (PWD) can create "caregiver burden," which is associated with negative outcomes for caregivers and PWD. The ZBI (Zarit Burden Interview) is a widely used unitary measure of caregiver burden. However, recent research has found caregiver burden to be multi-dimensional. The purpose of this study was to explore the factor structure of the ZBI within a sample of UK caregivers. A secondary aim was to identify variables that predicted burden dimensions found. Methods A total of 110 unpaid community caregivers of PWD completed the ZBI. They also completed the EACQ (Experiential Avoidance in Caregiving Questionnaire), DEX (Dysexecutive Questionnaire), PACS (Positive Aspects of Caregiving Scale), and a demographic questionnaire. ZBI data were analyzed via exploratory factor analysis (principal axis factoring). Relationships between burden factors and other variables were studied using Pearson correlations and multiple regression. Results Analysis identified three burden factors, namely direct impact of caregiving, uncertainty around the future, and frustration/embarrassment. A direct impact of caregiving and frustration/embarrassment has been found previously. Uncertainty over the future is a new factor, which was predicted by adult-child caregiver role, highlighting that spouses and adult children are likely to have different burden experiences. Additionally, uncertainty over the future and frustration/embarrassment were inversely predicted by PACS, suggesting that being mindful of positive aspects of caregiving may function as a protective factor for burden. Conclusions This study found caregiver burden to be multi-dimensional and uncovered a novel factor in uncertainty over the future, which warrants further exploration. Burden factors were associated with a range of modifiable variables that could be targeted within health and social care interventions to improve outcomes for caregivers and PWD.

Benevolence and authority as WEIRDly unfamiliar: A multi-language meta-analysis of paternalistic leadership behaviors from 152 studies

Based on a multi-language search, we qualitatively describe and meta-analytically summarize the growing but often ignored research literature on behaviors associated with paternalistic leadership (PL), a form of leadership that is considered to be acceptable and prevalent in many Non-WEIRD (Western, Educated, Industrialized, Rich, and Democratic) cultures. PL is conceptualized as the simultaneous enactment of two seemingly paradoxical leadership behaviors: 1) benevolence – the holistic and genuine care for followers' well-being even outside the workplace, and 2) authority – non-exploitative use of behaviors that emphasize power and control based on status and hierarchy. Results from 165 independent samples from 152 studies (total N = 68,395) in fourteen countries demonstrate a consistently divergent pattern across the dimensions. Even in societies where PL is presumed to be more prevalent and acceptable, the strong control (authoritarianism) dimension is consistently negatively related to task performance, citizenship behaviors, creativity, attitudes towards the leader, and job attitudes. Conversely, the benevolence dimension demonstrates consistently positive relationships with leader effectiveness and follower performance, attitudes, and behaviors. The most commonly used measure of PL includes a morality dimension, which produces positive effects similar to the benevolence dimension. Collectively, PL dimensions (as well as a separate unitary measure of PL emphasizing benevolence) predict incremental variance beyond transformational leadership and beyond LMX. Based on conceptual and empirical grounds, it appears that PL (especially benevolence) is not fully captured in mainstream approaches to leadership and may add value to our understanding of the universe of ways leadership can be enacted. Several directions for future research are discussed, including the need to study the rarely-examined interactions between benevolence and authority, in line with the core of PL theory.

Factors emerging from the "Zarit Burden Interview" and predictive variables in a UK sample of caregivers for people with dementia.

A total of 110 unpaid community caregivers of PWD completed the ZBI. They also completed the EACQ (Experiential Avoidance in Caregiving Questionnaire), DEX (Dysexecutive Questionnaire), PACS (Positive Aspects of Caregiving Scale), and a demographic questionnaire. ZBI data were analyzed via exploratory factor analysis (principal axis factoring). Relationships between burden factors and other variables were studied using Pearson correlations and multiple regression. Analysis identified three burden factors, namely direct impact of caregiving, uncertainty around the future, and frustration/embarrassment. A direct impact of caregiving and frustration/embarrassment has been found previously. Uncertainty over the future is a new factor, which was predicted by adult-child caregiver role, highlighting that spouses and adult children are likely to have different burden experiences. Additionally, uncertainty over the future and frustration/embarrassment were inversely predicted by PACS, suggesting that being mindful of positive aspects of caregiving may function as a protective factor for burden. This study found caregiver burden to be multi-dimensional and uncovered a novel factor in uncertainty over the future, which warrants further exploration. Burden factors were associated with a range of modifiable variables that could be targeted within health and social care interventions to improve outcomes for caregivers and PWD.

PTSD symptom severity and sensitivity to blood, injury, and mutilation in U.S. army special operations soldiers

Sensitivity to blood, injury, and mutilation (SBIM) may increase risk for posttraumatic stress disorder (PTSD), given that traumatic events often involve actual or perceived threat of bodily harm to oneself and/or others, including exposure to blood and other mutilation-related stimuli. A self-report questionnaire was administered to male, active duty, U.S. Army Special Operations Command soldiers who had deployed to Iraq and Afghanistan (n =694 males). We first used exploratory factor analysis to examine whether the 30-item Mutilation Questionnaire (Klorman et al., 1974) comprised a unitary measure of SBIM, finding that 10 of the items form a cohesive SBIM factor. Summed, those 10 SBIM items had a significant bivariate correlation with PTSD symptom severity. In a multiple regression analysis that included demographic characteristics and lifetime trauma exposure, SBIM was positively associated with PTSD symptom severity. Other significant multivariate predictors were high lifetime trauma exposure and junior enlisted rank. When trait neuroticism was added to the model to test the robustness of these findings, the association of SBIM with PTSD symptom severity remained significant. The results suggest that SBIM may be a risk factor for PTSD in male soldiers. Further research is warranted to improve measurement and understanding of SBIM.

Exploratory factor analysis of the reintegration to normal living index in a stroke population

Background: The reintegration to normal living index (RNLI) is a global assessment of patient quality of life often utilized in stroke populations. Previous studies in various general disability samples have consistently reported a two-factor solution for the RNLI. Despite its common use with stroke patients, the RNLI has not been psychometrically evaluated in an exclusively stroke sample. This study is believed to represent the first factor analysis of the RNLI using a sample comprised exclusively of individuals who have survived cerebral infarct.Objective: The aim of this study is to evaluate the psychometric properties of the RNLI in assessing quality of life of stroke survivors.Methods: We retrospectively examined RNLI scores of 928 adults with strokes of varying severities as part of a multidisciplinary, interinstitutional collaboration across an academic medical center, acute care hospital, and rehabilitation center. We utilized a principal component factor analysis to evaluate the factor structure of the RNLI.Results: Mean RNLI scores ±SD for the sample were 75.26 ± 19.85, ranging between 20 and 100. The Cronbach α was .94. A scree test for factor retention strongly suggested a single factor solution, explaining 64.50% of the total variance.Conclusions: Previous factor analyses on the RNLI utilizing general disability samples commonly report a two-factor solution. Our data support the presence of a single factor solution across the RNLI within a large sample comprised exclusively of stroke survivors. This suggests that the RNLI acts as more of a unitary measure of quality of life within a stroke sample relative to other disabled samples.

Fit for Purpose, Psychometric Assessment of the Eating Attitudes Test-26 in an Irish Adolescent Sample

The present study examined the psychometric properties of the Eating Attitudes Test-26 (EAT-26) in a sample of Irish adolescents (N=2444). Consistent with previous research, in adolescents, confirmatory factor analysis (CFA) failed to replicate the original three-factor structure of the EAT-26. Goodness-of-fit indices provided support for a recently published six-factor EAT-18 model. As the EAT-26 is typically used as a unitary measure by clinicians, a second-order factor model was investigated, which supported a general concept of eating problems. Convergent validity of the EAT-18 was assessed using the Eating Disorder Inventory-3 (EDI-3). Using the 90th percentile, a cut-off score of 13 was identified on the EAT-18 that discriminated between those indicative and non-indicative of disordered eating attitudes and behaviors. Findings suggest that the revised factor structures may be more suitable for the general adolescent population than the original three-factor EAT-26. Clinical implications of the EAT-18 and future research recommendations are addressed.

Refined matrix models from BPS counting

We construct a free fermion and matrix model representation of refined BPS generating functions of D2 and D0 branes bound to a single D6 brane, in a class of toric manifolds without compact four-cycles. In appropriate limit we obtain a matrix model representation of refined topological string amplitudes. We consider a few explicit examples which include a matrix model for the refined resolved conifold, or equivalently five-dimensional U(1) gauge theory, as well as a matrix representation of the refined MacMahon function. Matrix models which we construct have ordinary unitary measure, while their potentials are modified to incorporate the effect of the refinement.

P01-533 - Factorial structure of the general health questionnaire (GHQ-30) among psychiatric and somatic patients

BackgroundThe Goldberg's 30-item General Health Questionnaire (GHQ-30) is used as a screening instrument for psychological distress in the general population. GHQ-30 has been widely used as a unitary measure, but several underlying factors have been identified in previous studies based on factor analyses.AimTo analyze the internal consistency and the factor structure of the Polish version of GHQ-30 in the group of somatic and psychiatric patients’ subpopulations. Differences in factor structure among those two groups might have important implications for how the test is used in those populations.MethodsA total of 1473 patients (807 psychiatric and 666 somatic) were included into the study. A total score was calculated with Likert method. The principal factor analysis with orthogonal varimax normalized rotation was used for the factor extraction.ResultsThe GHQ-30 was found to have high internal consistency. The factorial analysis conducted for the whole group, as well as for psychiatric and somatic patients separately, showed that two factors labeled as followed can be abstracted from the global scale: “depression and anxiety” and “interpersonal functioning and general coping”. These factors jointly account for 54,2% – 62,3% of the variance.ConclusionsResults showed that GHQ-30 may be used both as a unitary measure using full-scale sores and allows to get more detailed information about individual's intra- and interpersonal functioning.

Review: Antoine Desgodets, Les edifices antiques de Rome, by Louis Cellauro and Gilbert Richaud

Louis Cellauro and Gilbert Richaud ; Antoine Desgodets, Les edifices antiques de Rome ; Rome: De Luca Editori d'Arte, 2008, 334 pp., 137 illus. €€ 75, ISBN 9788880168652 In the late summer of 1677, after more than a two-and-a-half year absence, twenty-four-year-old architect Antoine Desgodets returned to Paris. Three years earlier he had been sent to Rome by Franccois Blondel (professor, Academy of Architecture) to the French Academy, on a mission to measure and draft ancient buildings (22).1 Desgodets embarked in September 1674, along with architect Charles––Augustin Daviler and other colleagues, on a voyage from Marseilles to Civitavecchia, a journey that was interrupted by a corsair. Desgodets spent sixteen months in Algiers, and Daviler eighteen months in both Algiers and Tunis, as Ottoman slaves (22 note 41).2 Desgodets was released on 22 February 1676 in exchange for Ottomans captured by the French, and continued to his destination. During the sixteen months in Rome, Desgodets measured and drew forty-eight buildings, including twenty-five monuments of ancient Rome, in his sketchbook of 104 folios (24).3 Returning to Paris and the Academy of Architecture, where he had been admitted as a student in 1672,4 Desgodets presented drawings from his album, or Codex, to members of the Academy in December 1677 (30––31).5 Over several months, studious attempts were made to compare Desgodets's drawings and measurements with those in treatises and publications previously discussed by the Academy. The differing units of measure used by Serlio, Labacco, and Palladio made comparison difficult with the work of Desgodets, who worked in pieds du roi and modules, i.e., column diameters, as did Vitruvius. In March 1678 the Academy requested that a unitary measure be used henceforth to facilitate discussion (31).6 Desgodets apparently began preparing enlarged, finished drawings of selected examples from his Roman sketchbook for publication. An unpublished manuscript from the library of Colbert in the Bibliotheeque Nationale de France (Ms. 381) may be the manuscript published in 1682 as Les …

Factor Structure of the Test of Visual Perceptual Skills—Revised (TVPS-R)

Background Visual perceptual skills of school-aged children are often assessed by occupational therapists using the Test of Visual Perceptual Skills—Revised (TVPS-R). Tests like the TVPS-R need to exhibit adequate construct validity and unidimensionality. Objective The purpose of the study was to evaluate the factor structure and unidimensionality of the TVPS-R and its seven subscales. Methods The visual perceptual performance scores from a sample of 356 normally developing children (171 boys and 185 girls) ranging in age from 5 to 11 years were used to complete a factor analysis with orthogonal Varimax rotation on the TVPS-R and its seven subscales. Results All seven of the TVPS-R subscales exhibited multidimensionality instead of the expected unidimensionality. The TVPS-R composite scale exhibited multidimensionality as well. Conclusions The TVPS-R and its seven subscales are not unidimensional. The findings do not indicate that factor structure of the TVPS-R is a unitary measure of visual perceptual skills. Practitioners need to be cautious using the composite TVPS-R scale, calculated by summing the subscale perceptual quotients together, to evaluate the children's overall visual perceptual abilities.