Measurement Instruments Research Articles

Development of the Parent-to-Infant Bonding Scale: Validation in Swedish Mothers and Fathers in Community and Clinical Contexts.

Valid measurement instruments are needed to investigate the impact of parental bonding on child health development. The aim was to develop and validate a self-report questionnaire, the Parent-to-Infant Bonding Scale (PIBS) to measure bonding in both mothers and fathers. Internal consistency and construct validity were analysed using data from Swedish parents from both clinical (N = 182), and community (N = 122) population samples. Overall, good oracceptable internal consistency of the PIBS appeared. Convergent validity (against the Postpartum Bonding Questionnaire, analysed in the clinical sample) and discriminant validity (against the mental health constructs of depressive symptoms and anxiety) were demonstrated. The results support the PIBS as a measure of maternal and paternal bonding in community and clinical populations. Assessments of criterion validity in these populations are desirable. The similarities in PIBS measurement properties between the parent groups suggest its usefulness for comparisons between mothers and fathers, and for future investigations of unique and interactive impacts of maternal and paternal bonding on child outcomes using community and clinical cohorts.

Results of round robin form measurements of optical aspheres and freeform surfaces

High-quality aspherical and freeform surfaces are in high demand, and the high-accuracy form measurement of such surfaces is a challenging task. To explore the current status of form measurement systems for complex surfaces such as aspheres and freeforms, interlaboratory comparison measurements are performed. This study presents the pseudonymized results obtained using three different surfaces (metal asphere, glass asphere, toroidal surface) in a total of six different round robins. These results were taken from a total of 13 different measurement instruments based on 9 different measurement principles and operated at 12 different laboratories. They were analyzed using a sophisticated procedure that was first developed in 2018 and then refined and tested on simulated data in 2022 to address the challenges of such a comparison at this level of accuracy. In the current study, we applied these refined methods todata acquired from tactile and optical point measurements as well as from optical areal measurements. As there are no absolutely measured and very well characterized reference standard aspherical and freeform surfaces available at the accuracy level of a few tens of nanometers root-mean-square, the approximated true forms of the surfaces were derived from the measurements and indicate the manufacturing accuracy of the surface forms. Then, the measurement’s differences to the approximated true forms were analyzed, which directly indicate the systematic measurement errors of the instruments. By also comparing the approximated true forms from the two different round robins for each surface, additional insights into the reliability and stability of these so-called virtual reference topographies were gained.

Personalized Dosing of Medicines for Children: A Primer on Pediatric Pharmacometrics for Clinicians.

The widespread use of drugs for unapproved purposes remains common in children, primarily attributable to practical, ethical, and financial constraints associated with pediatric drug research. Pharmacometrics, the scientific discipline that involves the application of mathematical models to understand and quantify drug effects, holds promise in advancing pediatric pharmacotherapy by expediting drug development, extending applications, and personalizing dosing. In this review, we delineate the principles of pharmacometrics, and explore its clinical applications and prospects. The fundamental aspect of any pharmacometric analysis lies in the selection of appropriate methods for quantifying pharmacokinetics and pharmacodynamics. Population pharmacokinetic modeling is a data-driven method ('top-down' approach) to approximate population-level pharmacokinetic parameters, while identifying factors contributing to inter-individual variability. Model-informed precision dosing is increasingly used to leverage population pharmacokinetic models and patient data, to formulate individualized dosing recommendations. Physiologically based pharmacokinetic models integrate physicochemical drug properties with biological parameters ('bottom-up approach'), and is particularly valuable in situations with limited clinical data, such as early drug development, assessing drug-drug interactions, or adapting dosing for patients with specific comorbidities. The effective implementation of these complex models hinges on strong collaboration between clinicians and pharmacometricians, given the pivotal role of data availability. Promising advancements aimed at improving data availability encompass innovative techniques such as opportunistic sampling, minimally invasive sampling approaches, microdialysis, and in vitro investigations. Additionally, ongoing research efforts to enhance measurement instruments for evaluating pharmacodynamics responses, including biomarkers and clinical scoring systems, are expected to significantly bolster our capacity to understand drug effects in children.

Recommended measurement instruments for genitourinary symptoms associated with menopause: the COMMA (Core outcomes in menopause) consortium.

The aim of the study is to identify appropriate definitions and patient-reported outcome measures (PROMs) for each of the eight core outcomes previously selected for genitourinary symptoms associated with menopause: pain with sex, vulvovaginal dryness, vulvovaginal discomfort or irritation, discomfort or pain when urinating, change in most bothersome symptom, distress, bother or interference of genitourinary symptoms, satisfaction with treatment, and side effects. We conducted a systematic review to identify possible definitions and PROMs, including their measurement properties. Identified definitions and relevant PROMs with acceptable measurement properties were entered into an international consensus process involving 28 participants from 10 countries to achieve final recommendations for each core outcome. A total of 87 publications reporting on 34 PROMs were identified from 21,207 publications screened. Of these 34 PROMs, 29 were not considered to sufficiently map onto the core outcomes, and 26 of these also had insufficient measurement properties. Therefore, only five PROMs corresponding to two core outcomes were considered for recommendation. We recommend the PROMIS Scale v2.0 - Sexual Function and Satisfaction: Vaginal Discomfort with Sexual Activity to measure the outcome of "pain with sexual activity" and the Day-to-Day Impact of Vaginal Aging (DIVA) Questionnaire to measure "distress, bother or interference" from genitourinary symptoms. Six definitions of "side effects" were identified and considered. We recommend that all trials report adverse events in study participants, which is a requirement of Good Clinical Practice. Suitable PROMs and definitions were identified to measure three of eight core outcomes. Because of the lack of existing measures, which align with the core outcomes and have evidence of high-quality measurement properties, future work will focus on developing or validating PROMs for the remaining five core outcomes.

The roots of legitimacy in ethnic-cultural festivals and their influence on residents’ loyalty: an analysis of two Brazilian Oktoberfests

PurposeLegitimacy is a classic theme, quite present in organisational studies in general, but in the field of tourism it still has room to advance. For that reason, this research seeks to delimit the concept of legitimacy and adapt it to the context of tourism events; and seeks to validate a measurement instrument that allows to evaluate of its recognition in the imagination of residents, and to evaluate the impacts of this construct on residents’ trust in the organisers of Brazilian Oktoberfest, on the negative externalities of those events and, ultimately, on the achievement of residents’ loyalty.Design/methodology/approachThe locus of the research are the cities of Blumenau, Santa Catarina and Santa Cruz do Sul, Santa Catarina, both located in southern Brazil, whose residents answered an online questionnaire about the legitimacy of the Oktoberfest held there. A total of 365 valid questionnaires were collected, tabulated in statistical software and interpreted using exploratory-confirmatory factor analysis and structural equation modelling.FindingsThe results show that festival legitimacy is a theoretical construct that can be measured as either a first-order or second-order factor, consisting of three factors, called moral legitimacy, pragmatic legitimacy and cognitive legitimacy.Originality/valueThis research provides a valid and reliable tool for assessing local residents' acceptance of ethno-cultural festivals. It also shows variations in the perception of legitimacy, demonstrating that this can influence other aspects of residents' perception of ethnocultural events.

Perception of the Quality of Care by the Users in the Gynecology and Obstetric Service of a Public Hospital of High Speciality From Veracruz

Background: It is known that measuring the perception of the quality of care in a hospital has become a growing and important indicator of the efficiency of the health system; however, so far, Mexico has not set a precedent for it. Objective: To report the results obtained in order to evaluate its importance and impact. Material and Methods: A qualitative cohort, prospective longitudinal study was carried out in the High Specialty Hospital of the Secretary of Health and Assistance (SSA) of the state of Veracruz, in the different areas of the gynecology and obstetrics service (GYO), using the surveys provided by the official website of the State Government: http://www.calidad.salud.gob.mx/site/calidad/encuesta_satisfaccion_trato_digno.html as a measurement instrument. Unit of Analysis: 450 people following pertinent inclusion and exclusion criteria, with a confidence level of 99% and a confidence limit of 1.7%. Discussion: Given the growing demand for health services by users, it is imperative that both public and private institutions are up to the task, both in terms of quantity and quality of human capital. Conclusions: we consider it necessary to generate analysis and reflection devices that redefine the model of relationship between professionals and patients, considering the political, social and cultural variables in which this relationship is formed.

Evaluating keratometry and corneal astigmatism data from biometers and anterior segment tomographers and mapping to reconstructed corneal astigmatism.

To compare results from different corneal astigmatism measurement instruments; to reconstruct corneal astigmatism from the postimplantation spectacle refraction and toric intraocular lens (IOL) power; and to derive models for mapping measured corneal astigmatism to reconstructed corneal astigmatism. Retrospective single centre study involving 150 eyes treated with a toric IOL (Alcon SN6AT, DFT or TFNT). Measurements included IOLMaster 700 keratometry (IOLMK) and total keratometry (IOLMTK), Pentacam keratometry (PK) and total corneal refractive power in 3 and 4 mm zones (PTCRP3 and PTCRP4), and Aladdin keratometry (AK). Regression-based models mapping the measured C0 and C45 components (Alpin's method) to reconstructed corneal astigmatism were derived. Mean C0 components were 0.50/0.59/0.51 dioptres (D) for IOLMK/PK/AK; 0.2/0.26/0.31 D for IOLMTK/PTCRP3/PTCRP4; and 0.26 D for reconstructed corneal astigmatism. All corresponding C45 components ranged around 0. The prediction models had main diagonal elements lower than 1 with some crosstalk between C0 and C45 (nonzero off-diagonal elements). Root-mean-squared residuals were 0.44/0.45/0.48/0.51/0.50/0.47 D for IOLMK/IOLMTK/PK/PTCRP3/PTCRP4/AK. Results from the different modalities are not consistent. On average IOLMTK/PTCRP3/PTCRP4 match reconstructed corneal astigmatism, whereas IOLMK/PK/AK show systematic C0 offsets of around 0.25 D. IOLMTK/PTCRP3/PTCRP4. Prediction models can reduce but not fully eliminate residual astigmatism after toric IOL implantation.

Validation of the Recap of Atopic Eczema (RECAP) Measurement Instrument for Eczema Control in Adult Patients in an Asian Clinical Setting.

Recap of atopic eczema (RECAP) is a self-reported 7-item questionnaire recommended by the Harmonising Outcome Measures in Eczema initiative to measure eczema control. As RECAP has not been validated in a real-world clinical population in Asia, RECAP was investigated as a measure of eczema control in Singapore. Patients with atopic eczema at the National Skin Centre from July 2019 to January 2020 were included for analysis. Both patient- and physician-reported outcome measures were available for correlation analyses. Correlation analysis was also performed to investigate construct validity, and floor or ceiling effects of RECAP. A total of 260 atopic eczema patients aged between 15 and 87 years were recruited. There were minimal floor and ceiling effects for RECAP scores. There were strong, significant correlations of RECAP with POEM (r = 0.84, p < 0.001) and DLQI (r = 0.81, p < 0.001). Correlation with SCORAD was moderate (r = 0.60, p < 0.001). Correlations remained similar after age, gender, and ethnicity adjustments. Discriminative validity was demonstrated by a significant linear trend of increasing RECAP scores with increasing eczema severity. RECAP demonstrates good discriminative and construct validity evidenced by strong correlations with symptoms and quality of life and moderate correlations with eczema signs. RECAP is useful to measure eczema control in Singapore.

Impact of Lean Manufacturing Practices on Waiting Time of Patients in Outpatient Department (OPD): A Study in the Sri Lankan Public Healthcare Industry.

This study aims to explain the impact of lean manufacturing practices on waiting time of patients at the outpatient department (OPD) in the Public hospitals. Cross-sectional data using a survey sample of 384 patients in the Kandy public hospitals with a satisfied random sampling were used. Data were analyzed using SPSS software. This study covers the four independent variables of lean manufacturing practices namely: 5S, visual management, kaizen, and Just in Time. The dependent variable is waiting time. The measurement instrument for lean manufacturing practices and waiting time was developed from comprehensive literature reviews. Results indicate that there is a negative significant impact of lean manufacturing practices on waiting time of patients in outpatient department (Beta = -0.626 &amp; p=0.000). Therefore, these findings suggest that the theories of lean manufacturing and the knowledge-based view providing implementation of lean manufacturing practices can reduce waiting time for patients in outpatient department.

Gender mainstreaming in urban projects: A measurement proposal applied to Spanish Urban regeneration policies

Urban policies financed in the framework of the European Cohesion Policy are a privileged area for the study of the Gender Mainstreaming (GM) due to the gender European rules and to the importance of the European Union in urban development. The aim of this paper is to validate an instrument for the systematic measurement of the application of the GM tool, and to evaluate the implementation of GM in Spanish urban policies financed by the EU. For this purpose, based on previous measurements and analysis, a specific methodological tool has been elaborated and applied to the 89 urban intervention projects implemented in Spanish big cities in the framework of the URBAN I, URBAN II, URBANA, and ISUD (Integral and Sustainable Urban Development) calls for proposals (1994–2020). The results reflect a sectorial orientation in the application of the GM. Moreover, we observed a more significant implementation of the strategy in the direction setting dimensions and a scarcer integration in the actor-oriented dimensions. The dimensions' scores could reflect the classic difficulties for actor-oriented dimensions in urban policy design and the effect of the EU's lack of clarity about gender equality on a multi-level governance policy.

Optical Properties and Possible Origins of Atmospheric Aerosols over LHAASO in the Eastern Margin of the Tibetan Plateau

The accuracy of cosmic ray observations by the Large High Altitude Air Shower Observatory Wide Field-of-View Cherenkov/Fluorescence Telescope Array (LHAASO-WFCTA) is influenced by variations in aerosols in the atmosphere. The solar photometer (CE318-T) is extensively utilized within the Aerosol Robotic Network as a highly precise and reliable instrument for aerosol measurements. With this CE318-T 23, 254 sets of valid data samples over 394 days from October 2020 to October 2022 at the LHAASO site were obtained. Data analysis revealed that the baseline Aerosol Optical Depth (AOD) and Ångström Exponent (AE) at 440–870 nm (AE440–870nm) of the aerosols were calculated to be 0.03 and 1.07, respectively, suggesting that the LHAASO site is among the most pristine regions on Earth. The seasonality of the mean AOD is in the order of spring &gt; summer &gt; autumn = winter. The monthly average maximum of AOD440nm occurred in April (0.11 ± 0.05) and the minimum was in December (0.03 ± 0.01). The monthly average of AE440–870nm exhibited slight variations. The seasonal characterization of aerosol types indicated that background aerosol predominated in autumn and winter, which is the optimal period for the absolute calibration of the WFCTA. Additionally, the diurnal daytime variations of AOD and AE across the four seasons are presented. Our analysis also indicates that the potential origins of aerosol over the LHAASO in four seasons were different and the atmospheric aerosols with higher AOD probably originate mainly from Northern Myanmar and Northeast India regions. These results are presented for the first time, providing a detailed analysis of aerosol seasonality and origins, which have not been thoroughly documented before in this region, also enriching the valuable materials on aerosol observation in the Hengduan Mountains and Tibetan Plateau.

Small sample uncertainty evaluation of industrial robot position accuracy measurement based on grey model

The measurement of position accuracy of industrial robots has high complexity, and its uncertainty assessment is one of the important research topics. This study analyses the principle of measuring the position accuracy of industrial robots by laser tracker, the evaluation model of the measurement uncertainty of the position accuracy of industrial robots is established, and various factors affecting the measurement results are analysed, including industrial robot itself, the measurement instrument, the measurement personnel, the measurement strategy and the data processing method. There is a very small sample problem in the uncertainty evaluation process of the position accuracy of industrial robots. The literature and experiments show that the reliability of The Guide to the Expression of Uncertainty in Measurement is low under the condition of very small sample. In this study, an improved grey method is proposed to evaluate the uncertainty. The principle of the improved grey method is discussed in detail, and the general steps of the improved grey method are summarized. The experimental data prove that the standard deviation of very small sample calculated by the improved grey method has higher accuracy. Taking the position accuracy of an industrial robot measured by a laser tracker as an example, the improved grey method is successfully applied to the measurement uncertainty evaluation of the position accuracy of industrial robots.

Design and Validation of a Computational Thinking Test for Children in the First Grades of Elementary Education

Computational thinking (CT) has garnered significant interest in both computer science and education sciences as it delineates a set of skills that emerge during the problem-solving process. Consequently, numerous assessment instruments aimed at measuring CT have been developed in the recent years. However, a scarce part of the existing CT measurement instruments has been dedicated to early school ages, and few have undergone rigorous validation or reliability testing. Therefore, this work introduces a new instrument for measuring CT in the early grades of elementary education: the Computational Thinking Test for Children (CTTC). To this end, in this work, we provide the design and validation of the CTTC, which is constructed around spatial, sequential, and logical thinking and encompasses abstraction, decomposition, pattern recognition, and coding items organized in five question blocks. The validation and standardization process employs the Kuder–Richardson statistic (KR-20) and expert judgment using V-Aiken for consistency. Additionally, item difficulty indices were utilized to gauge the difficulty level of each question in the CTTC. The study concludes that the CTTC demonstrates consistency and suitability for children in the first cycle of primary education (encompassing the first to third grades).

An evaluation of the psychometric properties of the Australian Collaborative Practice Assessment Tool

Objectives This study aimed to validate the Collaborative Practice Assessment Tool (CPAT) in the Australian setting and provide a quality instrument in terms of psychometric properties that can be used to measure interprofessional outcomes for both healthcare practitioners and students. The outcomes evaluated include the capacity to work in an interprofessional team, good interprofessional communication skills, leadership skills, ensuring clear division of tasks and roles in a team, effective conflict management, and being actively involved with patients and their families/communities in care. Methods The COSMIN (COnsensus-based Standards for the selection of health Measurement INstruments) taxonomy and standards were used as guides for evaluating the psychometric properties of the Australian CPAT, which include evaluations regarding instrument development requirements of sample target and size, content validity, internal structure (structural validity, internal consistency reliability and measurement invariance), and hypotheses testing. CPAT Australia was developed through two stages involving pilot studies and a validation study, both of which included healthcare practitioners and students as participants. A pilot study examined content validity regarding item relevance, item comprehensibility, and instrument comprehensiveness. The validation study was carried out to assess the internal structure of CPAT Australia for aspects of structural validity, internal consistency reliabilities, and configural, metric and scalar measurement invariance. The structural validity was explored using the following three steps: exploratory, confirmatory, and multi-group factor analysis. Construct validity was evaluated to confirm direct and indirect paths of assumptions based on a previously validated model. Data collected between August 2021 and May 2022. Results The content validity evaluation confirmed that all items were relevant, understandable and comprehensive for measuring interprofessional collaborative care in Australia. Three hundred ninety-nine participants contributed to the validation study (n=152 practitioners; n=247 students). The original instrument model of 8-Factor 56-Item was improved in the Australian CPAT. Two items, Item 27 (Physicians assume the ultimate responsibility) and Item 49 (Final decision rest with the physician), were consistently rejected and therefore discarded. The internal structure of the 7-Factor 54-Item solution was confirmed as a suitable model with fit indices meeting COSMIN standards for a good model in practitioner and student cohorts. Configural, metric and scalar invariances were confirmed, indicating the invariance of the instruments when used for the practitioner and student cohorts. The construct validity evaluation indicated that 81.3% of direct and indirect assumptions were accepted, fulfilling the COSMIN requirement of &gt;75% of proposed assumptions being accepted. Conclusion The Australian CPAT with a 7-factor 54-item solution was confirmed as a quality measure for assessing interprofessional education and collaborative practice for both healthcare practitioners and students in Australia with robust psychometric properties.

THE CONTRIBUTION OF THE DE FILIPPI EXPEDITION (1913–1914) TO THE GEOLOGICAL KNOWLEDGE OF THE AKSAI CHIN REGION (WESTERN HIMALAYA)

ABSTRACT Between the years 1913 to 1914 the De Filippi Expedition, led by the Italian explorer and mountaineer Filippo De Filippi (1869–1938), traversed the Himalayan Range from Kashmir to Baltistan and Xinjiang. Exploring mostly unknown territories, traveling more than 2000 kilometers, and equipped with advanced instruments for geodetic and meteorological measurements, the expedition members surveyed, mapped and collected rocks and fossils including from the remote Aksai Chin region. After almost two years, the expedition returned to Italy, however, publication of the findings was delayed due to the outbreak of the First World War. The fossil material and syntheses of the geology and stratigraphy of the area represented unique documents on this sector of Western Tibet, with the Cretaceous Period being documented by the expedition for the first time in the whole Trans-Himalayan Range. The Aksai Chin region remains poorly explored even today, and the De Filippi collection which is housed in the Natural History Museum of the University of Florence now represents one of the few records available for reconstructing the stratigraphy of the area. It constitutes a valuable resource regarding the history of the scientific exploration and understanding of the geology and paleontology of the region, providing a unique window into a very remote and fascinating part of the world.

German translation and linguistic validation of the modified short questionnaire to assess health-enhancing physical activity (mSQUASH) for patients with axial spondyloarthritis (axSpA)

Patients with axial spondyloarthritis (axSpA) often experience chronic pain and inflammation, resulting in physical impairments, reduced mobility and decreased physical activity. The modified short questionnaire to assess health-enhancing physical activity (mSQUASH) was developed to assess daily physical activity in patients with axSpA. To translate, cross-culturally adapt and linguistically validate the original mSQUASH into German for patients with axSpA. The original mSQUASH was translated from Dutch into German using amultistep process (Beaton method) with forward-backward translations into German by bilingual Dutch-German lay people and experts. Any remaining discrepancies were resolved by ascientific committee, resulting in aprefinal German version. Field testing with cognitive debriefing interviews with patients with axSpA from diverse backgrounds led to afinal German version. Minor discrepancies, primarily related to formalities, semantic errors and syntax were found during translations. These were addressed, resulting in slight wording modifications. The prefinal German version was validated through cognitive debriefing by 10patients with axSpA, confirming its linguistic validity and equivalence to the Dutch version. Overall, this study confirmed the final German mSQUASH as acomprehensive measurement instrument for daily physical activity. It can now be used as apatient-reported outcome by German patients with axSpA. This can enable cross-linguistic comparisons and expanding its utility across language barriers.

Personality Traits in Latin America: A Cross-Cultural Study of the Big Five Factor Structure and its Relationship with Self-Reported Daily Behaviors

The Big Five factors model of personality is one of the most internationally studied and applied since it has been replicated in multiple investigations in different countries and cultures. This five-dimensional structure has evidence from studies carrying out factor analyses in different versions and adaptations of personality measurement instruments under these theoretical assumptions, and cross-cultural studies reveal its universality. However, no research has investigated how this structure is replicated in Latin American countries yet. This study aimed to carry out a cross-cultural study evaluating the factorial congruence of the Revised International Personality Item Pool in Latin American countries. The validity was also analyzed assessing relationships with gender, age, and self-reported activities of daily living. The five-dimensional structure was supported by evidence in the different samples that participated in this study, preserving the individual differences that characterize each country. Differences according to gender and age were found in different personality factors, as well as relationships with recreational activities. It is concluded that the five-factor structure of the scale is replicated in Latin American samples and that the psychometric properties of the instrument are consistent. Limitations and future lines of research are discussed.

Socio-technical transitions towards sustainable development: A proposal for learning assessment in livestock SMEs in the semi-arid Pampas of Argentina

The urgency to achieve the Sustainable Development Goals in the face of climate change has increased interest in studies on innovation niches in food systems. Strategic Niche Management in the framework of the Multi-Level Perspective considers that deep learning must be achieved in experimenting with innovations and demands greater understanding of instrumental aspects to guide the evolution of a niche. This study proposes to assess the progress of innovative performance towards sustainability of small and medium livestock enterprises in the Southwest of Buenos Aires, a fragile region of the Pampas biome of Argentina, as a result of learning generated in rural extension activities of the National Institute of Agricultural Technology (INTA) in order to identify leverage points in the process of technological change towards more sustainable systems. An exploratory-descriptive study was carried out using qualitative-quantitative methods. Ten producers were interviewed and the MESMIS method was proposed for the construction of indicators and assessment of learning goals towards sustainability. A rapprochement of producers from modal practices to more innovative ones was observed, reflecting conditions for the progress and consolidation of the niche. However, they need for greater professionalization and institutional articulation. The study generated a measurement instrument for the self-assessment of the niche enterprises and the planning of INTA's intervention strategies. It sought to broaden empirical research in Latin America, which is still scarce in approaches to socio-technical transitions, and to advance in the evaluation of experiments in transformative innovations on the agenda for the literature.

Accurate kinematic calibration of a six-DoF serial robot by using hybrid models with reduced dimension and minimized linearization errors

Accurate kinematic calibration of a six-DoF serial robot by using hybrid models with reduced dimension and minimized linearization errors

Laser Tracker and Terrestrial Laser Scanner Range Error Evaluation by Stitching

Laser trackers (LTs) are dimensional measurement instruments commonly employed in the manufacture and assembly of large structures. Terrestrial laser scanners (TLSs) are a related class of dimensional measurement instruments more commonly employed in surveying, reverse engineering, and forensics. Commercially available LTs typically have measurement ranges of up to 80 m. The measurement ranges of TLSs vary from about 50 m to several hundred meters, with some extending as far as several kilometers. It is difficult, if not impossible, to construct long reference lengths to evaluate the ranging performances of these instruments over that distance. In this context, we explore the use of stitching errors (i.e., stacking errors in adjoining or overlapping short lengths) and stitching lengths (i.e., constructing long reference lengths from multiple positions of a reference instrument by registration) to evaluate these instruments. Through experimental data and a discussion on uncertainty, we show that stitching is indeed a viable option to evaluate the ranging performances of LTs and TLSs.