An Empirical Demonstration of the Stability of the Maximized Correlation as an Internal-Consistency Reliability Estimate for Tests of Small Item Size

1990 ◽  
Vol 50 (3) ◽  
pp. 539-544 ◽  
Author(s):  
Edwin E. Wagner ◽  
Holiday E. Adair ◽  
Ralph A. Alexander
2017 ◽  
Vol 32 (2) ◽  
Author(s):  
Shannon Gwin ◽  
Paul Branscum ◽  
E. Laurette Taylor

The purpose of this study was to create a valid and reliable instrument to evaluate theory-basedbeliefs towards physical activity among clergy members. Data were collected from 174 clergy that par-ticipated in a 15-item online and paper-based survey. Psychometric properties of the instrument includedconfirmatory factor analysis (construct validity), and cronbach’s alpha (internal consistency reliability).In addition, the stability (test-retest reliability) of each subscale was evaluated with a sub-sample of 30participants. Results show the instrument was both valid and reliable, and will be useful in future studiestargeting this population. Future implications are discussed.


1994 ◽  
Vol 79 (2) ◽  
pp. 928-930 ◽  
Author(s):  
Gerald Halpin ◽  
Glennelle Halpin ◽  
Scott Arbet

The purpose of this study was to examine the effects on Cronbach coefficient alpha, an estimate of internal consistency reliability, of altering the number and type of item-response choices on measures administered to two independent samples ( ns, 492 and 730). An increase in the number and type of response choices (from true/false format to four-choice Likert-type format) significantly increased the internal consistency reliability estimate.


2014 ◽  
Vol 39 (2) ◽  
pp. 121-129 ◽  
Author(s):  
Stephanie H. Parade ◽  
Susan Dickstein ◽  
Masha Schiller ◽  
Lisa Hayden ◽  
Ronald Seifer

The current study examined the stability of temperament over time. Observers and mothers rated child behavior at eight timepoints across three assessment waves (8, 15, and 30 months of age). Internal consistency reliability of aggregates of the eight observer reports and eight mother reports were high. When considering single timepoint assessments, stability of temperament between assessment waves was generally low to moderate in magnitude. When the eight observations were aggregated, rather than when single timepoints were considered, between-wave stability of temperament increased. Mother reports of temperament were generally more stable than observer reports. Results have important methodological implications and suggest multiple observations of child behavior within a single developmental period are necessary to evaluate the stability of temperament over time.


2004 ◽  
Vol 12 (1) ◽  
pp. 63-75 ◽  
Author(s):  
Sarah Allison

This study developed and evaluated the Nurse Codependency Questionnaire (NCQ) and generated initial estimates of the stability and internal consistency of responses for the questionnaire. An initial pool of 95 items, reflective of four domains of codependency, was generated from the codependency literature using a domain-referenced approach. Seven expert judges from the nursing and codependency fields calculated the content validity index (CVI) as > .80. Items were critiqued for relevance, clarity, and predicted direction of each item’s correlation with the total codependency score. A convenience sample of 547 male and female nurses from Texas was recruited from a variety of professional settings to test the NCQ. Evidence of reliability and validity was sought through the use of principal factor analysis (PFA) techniques and correlation analysis. The specific domains of “codependent caretaking” and “lack of voice” represented two of the four hypothesized domains that were supported by factor analysis. Data screening and item analysis resulted in a final sample of 24 items. Test-retest reliability was .90 and internal consistency reliability was .80 for the entire scale. Reliability estimates for the “codependent caretaking” and “lack of voice” scales were .65 and .59, respectively for test-retest; and .81 and .64, respectively for internal consistency. Known groups validity was supported by each of the factors’ ability to discriminate between binge and nonbinge eaters. The NCQ may be useful for identifying codependency within the nursing profession. Research is needed to determine the external factors that influence the overt expression of nurse codependency. Screening for nurse codependency may contribute to the health of the profession by providing a means for anticipatory guidance and early intervention.


1984 ◽  
Vol 9 (2) ◽  
pp. 151-161 ◽  
Author(s):  
Norman Cliff

Kuder-Richardson Formula 20 was derived on the assumption that the average covariance between items on different forms is the same as the average covariance on the same form. This formula is considered an underestimate of the parallel form reliability because the average covariance of items with identical difficulty is expected to be higher than the average covariance of items of different difficulty. The proposed coefficient is derived by assuming instead that the average Goodman-Kruskal gamma between items of identical difficulty would be the same as the average for items of different difficulty. Given the average gamma for the present items, this permits an estimate of the covariance between items of identical difficulty. This leads directly to an estimate of the correlation between scores on the present test and those on a form that had an identical distribution of difficulty. Some examples are given.


BMJ Open ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. e040699
Author(s):  
Fares Alahdab ◽  
Andrew J Halvorsen ◽  
Jayawant N Mandrekar ◽  
Brianna E Vaa ◽  
Victor M Montori ◽  
...  

BackgroundThere has been limited research on the positive aspects of physician wellness and to our knowledge there have been no validity studies on measures of resilience and grit among internal medicine (IM) residents.ObjectivesTo investigate the validity of resilience (10 items Connor-Davidson Resilience Scale (CD-RISC 10)) and grit (Short Grit Scale (GRIT-S)) scores among IM residents at a large academic centre, and assess potential associations with previously validated measures of medical knowledge, clinical performance and professionalism.MethodsWe evaluated CD-RISC 10 and GRIT-S instrument scores among IM residents at the Mayo Clinic Rochester, Minnesota between July 2017 and June 2019. We analysed dimensionality, internal consistency reliability and criterion validity in terms of relationships between resilience and grit, with standardised measures of residents’ medical knowledge (in-training examination (ITE)), clinical performance (faculty and peer evaluations and Mini-Clinical Evaluation Examination (mini-CEX)) and professionalism/dutifulness (conference attendance and evaluation completion).ResultsA total of 213 out of 253 (84.2%) survey-eligible IM residents provided both CD-RISC 10 and GRIT-S survey responses. Internal consistency reliability (Cronbach alpha) was excellent for CD-RISC 10 (0.93) and GRIT-S (0.82) overall, and for the GRIT subscales of consistency of interest (0.84) and perseverance of effort (0.71). CD-RISC 10 scores were negatively associated with ITE percentile (β=−3.4, 95% CI −6.2 to −0.5, p=0.02) and mini-CEX (β=−0.2, 95% CI −0.5 to −0.02, p=0.03). GRIT-S scores were positively associated with evaluation completion percentage (β=2.51, 95% CI 0.35 to 4.67, p=0.02) and conference attendance (β=2.70, 95% CI 0.11 to 5.29, p=0.04).ConclusionsThis study revealed favourable validity evidence for CD-RISC 10 and GRIT-S among IM residents. Residents demonstrated resilience within a competitive training environment despite less favourable test performance and grittiness that was manifested by completing tasks. This initial validity study provides a foundation for further research on resilience and grit among physicians in training.


2021 ◽  
pp. 003435522110142
Author(s):  
Deniz Aydemir-Döke ◽  
James T. Herbert

Microaggressions are daily insults to minority individuals such as people with disabilities (PWD) that communicate messages of exclusion, inferiority, and abnormality. In this study, we developed a new scale, the Ableist Microaggressions Impact Questionnaire (AMIQ), which assesses ableist microaggression experiences of PWD. Data from 245 PWD were collected using Amazon’s Mechanical Turk (MTurk) platform. An exploratory factor analysis of the 25-item AMIQ revealed a three-factor structure with internal consistency reliability ranging between .87 and .92. As a more economical and psychometrically sound instrument assessing microaggression impact as it pertains to disability, the AMIQ offers promise for rehabilitation counselor research and practice.


2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Pau Pérez-Sales ◽  
Raquel González-Rubio ◽  
Blanca Mellor-Marsá ◽  
Gonzalo Martínez-Alés

Abstract Background Torture methods have traditionally been quantified using checklists. However, checklists fail to capture accurately both the almost infinite range of available methods of torture and the victims’ subjective experience. The Torturing Environment Scale (TES) was designed as a multidimensional alternative that groups torture methods according to the specific human function under attack. This study aims to do an exploratory assessment of the internal consistency reliability and discriminatory validity of the TES as part of a construct validity assessment in a sample of Basque torture survivors. Methods We applied the TES to a sample of 201 torture survivors from the Istanbul Protocol Project in the Basque Country Study (IPP-BC) to profile torturing environments in detention. To estimate the internal consistency reliability of the scale, categorical omega values were obtained for each subscale of the TES. To assess its discriminatory validity, the “known groups” method was used comparing mean scorings by gender, state security forces involved in the detention, and decade (the 1980s to the present) when the events took place. Results Men reported more physical pain, while women reported more attacks on self-identity and sexual integrity. The TES also showed significant differences as regards the security forces involved in the detention: Civil Guard (a militarised police) used more manipulation of the environment, threats, fear, pain and extreme pain, as compared to national and regional corps. Finally, although patterns of torture remained mostly unchanged across decades, more recent detentions included more emphasis on psychological attacks: context manipulation, humiliation linked to sexual identity, and attacks to meaning and identity. For all subscales of the TES, categorical omega values ranged from 0.44 to 0.72. Conclusion The TES may be a useful tool in profiling torturing environments. Its sensitivity to key contextual variables supports the discriminatory validity of the scale. While some of the subscales showed an acceptable degree of internal consistency, others require further analysis to improve reliability. The scale provides unique insights into the profile of contemporary torture. It will allow for future quantitative research on the relationship between different torturing environments and the medical and psychological consequences thereof.


2019 ◽  
Vol 185 (24) ◽  
pp. 757-757 ◽  
Author(s):  
Sarah Stadig ◽  
B Duncan X Lascelles ◽  
Gorel Nyman ◽  
Anna Bergh

BackgroundFeline osteoarthritis (OA) is a common cause of long-standing pain and physical dysfunction. Performing a physical examination of a cat is often challenging. There is a need for disease-specific questionnaires or the so-called clinical metrology instruments (CMIs) to facilitate diagnosis and evaluation of treatment of feline OA. The CMI provides the owners an assessment of the cat’s behavioural and lifestyle changes in the home environment. The purpose of the study was to evaluate readability, internal consistency, reliability and discriminatory ability of four CMIs.MethodsThis is a prospective, cross-sectional study with 142 client-owned cats. Feline OA was diagnosed based on medical history, orthopaedic examination and radiography.ResultsThe results indicate that all four instruments have sound readability, internal consistency, are reliable over time and have good discriminatory ability. Preliminary cut-off values with optimal sensitivity and specificity were suggested for each instrument. The osteoarthritic cats showed significant changes in behavioural response to pain during orthopaedic examination, compared with sound cats.ConclusionThe results indicate that all four questionnaires make an important contribution in a clinical setting, and that the cat’s behavioural response to pain during physical examination should be a parameter to take into account as a possible indication of chronic pain.


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