Effects of Number and Type of Response Choices on Internal Consistency Reliability

1994 ◽  
Vol 79 (2) ◽  
pp. 928-930 ◽  
Author(s):  
Gerald Halpin ◽  
Glennelle Halpin ◽  
Scott Arbet
Keyword(s):  
Item Response ◽  
Internal Consistency ◽  
Internal Consistency Reliability ◽  
Coefficient Alpha ◽  
Reliability Estimate ◽  
Response Choices ◽  
True False

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.

scholarly journals Internal consistency reliability, construct validity, and item response characteristics of the Kessler 6 scale among hospital nurses in Vietnam

PLoS ONE ◽  
2020 ◽  
Vol 15 (5) ◽  
pp. e0233119
Author(s):  
Norito Kawakami ◽  
Thuy Thi Thu Tran ◽  
Kazuhiro Watanabe ◽  
Kotaro Imamura ◽  
Huong Thanh Nguyen ◽  
...  
Keyword(s):  
Construct Validity ◽  
Item Response ◽  
Internal Consistency ◽  
Internal Consistency Reliability ◽  
Hospital Nurses ◽  
Response Characteristics

Psychometric Characteristics of the Health Opinion Survey

1977 ◽  
Vol 40 (3_suppl) ◽  
pp. 1160-1162 ◽  
Author(s):  
R. Olukayode Jegede
Keyword(s):  
Medical Students ◽  
Secondary School ◽  
Internal Consistency ◽  
Internal Consistency Reliability ◽  
Coefficient Alpha ◽  
Opinion Survey ◽  
Psychometric Characteristics ◽  
The Mean ◽  
Secondary School Pupils

Gurin's modification of the Health Opinion Survey was completed by 178 medical students, aged 19 to 25 yr., and 241 secondary school pupils, aged 9 to 19 yr. Internal consistency reliability measured by coefficient alpha was .77 and .79, respectively, on the two ratings. The mean of the correlation of each item with the remaining items was .34 for each rating. These findings show that the items on the instrument have much in common, which implies that a single trait may be measured by the Health Opinion Survey.

scholarly journals Development of the final version of the occupational adaptation questionnaire for family caregivers

2021 ◽  
pp. 156918612098335
Author(s):  
Takashi Nagai ◽  
Yoshikazu Ishii ◽  
Kengo Kohiyama ◽  
Takahiro Takenaka ◽  
Takashi Yamada
Keyword(s):  
Construct Validity ◽  
Family Caregivers ◽  
Item Response ◽  
Internal Consistency ◽  
Outpatient Service ◽  
Reliability And Validity ◽  
Internal Consistency Reliability ◽  
Difficulty Level ◽  
Occupational Adaptation ◽  
Discrimination Ability

Background Given the growing role of family caregivers in meeting the increasing demand for ageing-related care in Japan, the occupational adaptation of family caregivers needs to be evaluated. Methods This study developed the Occupational Adaptation Questionnaire for Family Caregivers (OAQC) and evaluated its reliability, validity, and effectiveness. To develop the OAQC item pool, the construct ‘Occupation of nursing care engaged in by family caregivers’ was evaluated. Using the Delphi method, 8 experts evaluated 64 items and confirmed that 41 items adequately represented the domain. The scale was then completed by 216 family caregivers of users of outpatient service establishments affiliated with hospitals in the Chubu region. The validity of the scale items was tested, and statistical analysis was performed. The construct validity and internal consistency of the OAQC were examined using exploratory factor analysis and the ω coefficient, respectively. Results The discrimination ability and difficulty level were calculated using the item response theory. The findings showed that the scale’s reliability and validity were satisfactory. Construct validity was acceptable for 16 items with 5 factors. The OAQC also had high internal consistency, reliability, and effectiveness. The item slope parameters and difficulty parameters revealed good item response, indicating that the scale could effectively measure family caregivers’ occupational adaptation. Conclusion The scale was compatible with the data obtained from family caregivers. Given its overall effectiveness, data obtained using the OAQC can contribute towards implementing personal care support programs for caregivers and enriching their lives by offering support from an occupational adaptation perspective.

scholarly journals On Cronbach’s Alpha as the Mean of All Possible k-Split Alphas

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Matthijs J. Warrens
Keyword(s):  
Internal Consistency ◽  
Internal Consistency Reliability ◽  
Reliability Coefficient ◽  
Coefficient Alpha ◽  
Equal Size ◽  
Cronbach’S Alpha ◽  
Cronbach's Alpha ◽  
The Mean ◽  
The Difference

Coefficient alpha is the most commonly used internal consistency reliability coefficient. Alpha is the mean of all possible k-split alphas if the items are divided into k parts of equal size. This result gives proper interpretations of alpha: interpretations that also hold if (some of) its assumptions are not valid. Here we consider the cases where the items cannot be split into parts of equal size. It is shown that if a k-split is made such that the items are divided as evenly as possible, the difference between alpha and the mean of all possible k-split alphas can be made arbitrarily small by increasing the number of items.

An Improved Internal Consistency Reliability Estimate

1984 ◽  
Vol 9 (2) ◽  
pp. 151-161 ◽  
Author(s):  
Norman Cliff
Keyword(s):  
Internal Consistency ◽  
Internal Consistency Reliability ◽  
Reliability Estimate ◽  
Parallel Form ◽  
Present Test ◽  
Identical Distribution

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.

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