The purpose of this study was to validate a new interview-administered physical activity questionnaire (Assessment of Physical Activity in Frail Older People; APAFOP) in older people with and without cognitive impairment. The authors assessed feasibility, validity, and test–retest reliability in 168 people (n = 78 with, n = 88 without cognitive impairment). Concurrent validity was assessed against an inertia-based motion sensor and an established questionnaire. Sensitivity to change was tested in an ongoing study in patients with mild to moderate dementia (n = 81). Assessment of physical activity by the APAFOP and the motion sensor correlated well in the total sample (TS; p = .705), as well as in the subsamples with cognitive impairment (CI; p = .585) and without CI (p = .787). Excellent feasibility with an acceptance rate of 100%, test–retest reliability (intraclass correlation coefficients ranging from .973 (TS) to .975 (CI) to .966 (no CI), and sensitivity to change (effect sizes: 0.35–1.47) were found in both subsamples.
Klaus Hauer, Stephen R. Lord, Ulrich Lindemann, Sarah E. Lamb, Kamiar Aminian and Michael Schwenk
Isaac Estevan, Javier Molina-García, Gavin Abbott, Steve J. Bowe, Isabel Castillo and Lisa M. Barnett
such questions, it is noted that some societies can be considered as relational (i.e., the group is considered as paramount rather than the individual), while others could be described as individualistic societies ( Cross & Madson, 1997 ). In this line, it is important to investigate the validity of
Randall J. Bergman, Justin W. Spellman, Michael E. Hall and Shawn M. Bergman
This study examined the validity of a selected free pedometer application (iPedometer; IP) for the iPhone that could be used to assess physical activity.
Twenty college students (10 men, 10 women; mean age: 21.85 ± 1.57 yrs) wore an iPhone at 3 locations (pocket, waist, arm) and a StepWatch 3 Step Activity Monitor (SW) on their right ankle while walking on a treadmill at 5 different speeds (54, 67, 80, 94, 107 m·min−1). A research assistant counted steps with a tally counter (TC).
Statistical significance between the TC, SW, and IP was found during every condition except IP in the pocket at 107 m·min−1 (F 2,38 = .64, P = .54). Correlations involving the IP revealed only 1 positive correlation (IP on arm at 54 m·min−1) for any of the conditions (r = .46, P = .05).
The IP application was not accurate in counting steps and recorded significantly lower step counts than the SW and TC. Thus, the free pedometer application used is not a valid instrument for monitoring activity during treadmill walking.
Stephen K. Ford and Jeffery J. Summers
The factorial validity of the attentional-style subscales of the Test of Attentional and Interpersonal Style (TAIS) have recently been questioned, although the evidence is only indirect. This study aimed to examine, directly, the factorial validity of these scales and to cross-validate the results. Two samples of 210 first-year psychology students responded to the 52 items comprising the attention-related subscales of the TAIS. A multidimensional confirmatory factor analysis (MCFA) was conducted on the interitem covariance matrix to test the measurement model underlying the six subscales. The MCFA results failed to support the model. Furthermore, internal consistency coefficients and item-total coefficients also supported the view that many of the subscales have insufficient factorial validity. Of the 52 items, 44% correlated better with at least one subscale other than their own, which indicates poor discriminant validity. Analysis of item content reveals some explanation for the poor discriminant validity. All results were cross-validated with the second sample.
Jacob A. Goldsmith, Cameron Trepeck, Jessica L. Halle, Kristin M. Mendez, Alex Klemp, Daniel M. Cooke, Michael H. Haischer, Ryan K. Byrnes, Robert F. Zoeller, Michael Whitehurst and Michael C. Zourdos
criterion systems, the Optotrak Certus 3-dimensional motion capture system (OC3D) is a reliable and valid criterion measurement of movement velocity. 3 Investigations examining validity of LPTs have limitations including not comparing the devices to a true criterion, 4 or performing insufficient
Franco M. Impellizzeri and Samuele M. Marcora
We propose that physiological and performance tests used in sport science research and professional practice should be developed following a rigorous validation process, as is done in other scientific fields, such as clinimetrics, an area of research that focuses on the quality of clinical measurement and uses methods derived from psychometrics. In this commentary, we briefly review some of the attributes that must be explored when validating a test: the conceptual model, validity, reliability, and responsiveness. Examples from the sport science literature are provided.
Pamela L.Y.H. Ching and William H. Dietz Jr.
Nonobese, preadolescent girls self-reported, and their parents provided proxy reports of daughters’ daily activities using questionnaires. Responses were evaluated for test-retest reliability, and for validity using one-week diaries. Results indicated all three respondents provided reproducible estimates of time daughters spent watching TV; daughters and mothers, of time daughters spent sleeping; and parents, of time daughters spent in vigorous activities. However, only daughters >10 years of age could provide valid reports for time spent in moderate activities and in sedentary and light activities on school days. Study results suggest that daughters and parents have difficulty providing reliable and valid estimates of activity level.
Marieke J.G. van Heuvelen, Gertrudis I.J.M. Kempen, Johan Ormel and Mathieu H.G. de Greef
To evaluate the validity of self-report measures of physical fitness as substitutes for performance-based tests, self-reports and performance-based tests of physical fitness were compared. Subjects were a community-based sample of older adults (N = 624) aged 57 and over. The performance-based tests included endurance, flexibility, strength, balance, manual dexterity, and reaction time. The self-report evaluation assessed selected individual subcomponents of fitness and used both peers and absolute standards as reference. The results showed that compared to performance-based tests, the self-report items were more strongly interrelated and they less effectively evaluated the different subdomains of physical fitness. Corresponding performance-based tests and self-report items were weakly to moderately associated. All self-report items were related most strongly with the performance-based endurance test. Apparently. older people tend to estimate overall fitness, in which endurance plays an important part, rather than individual subcomponents of Illness. Therefore, the self-report measures have limited validity as predictors of performance-based physical fitness.
Akitomo Yasunaga, Hyuntae Park, Eiji Watanabe, Fumiharu Togo, Sungjin Park, Roy J. Shephard and Yukitoshi Aoyagi
The Physical Activity Questionnaire for Elderly Japanese (PAQ-EJ) is a self-administered physical activity questionnaire for elderly Japanese; the authors report here on its repeatability and direct and indirect validity. Reliability was assessed by repeat administration after 1 month. Direct validation was based on accelerometer data collected every 4 s for 1 month in 147 individuals age 65–85 years. Indirect validation against a 10-item Barthel index (activities of daily living [ADL]) was completed in 3,084 individuals age 65–99 years. The test–retest coefficient was high (r = .64–.71). Total and subtotal scores for lower (transportation, housework, and labor) and higher intensity activities (exercise/sports) were significantly correlated with step counts and durations of physical activity <3 and ≥3 METs (r = .41, .28, .53), respectively. Controlling for age and ADL, scores for transportation, exercise/sports, and labor were greater in men, but women performed more housework. Sex- and ADL- or age-adjusted PAQ-EJ scores were significantly lower in older and dependent people. PAQ-EJ repeatability and validity seem comparable to those of instruments used in Western epidemiological studies.
Lisa S. Jutte, Kenneth L. Knight and Blaine C. Long
Examine thermocouple model uncertainty (reliability + validity).
First, a 3 × 3 repeated measures design with independent variables electrothermometers and thermocouple model. Second, a 1 × 3 repeated measures design with independent variable subprobe.
Three electrothermometers, 3 thermocouple models, a multi-sensor probe and a mercury thermometer measured a stable water bath.
Main Outcome Measures:
Temperature and absolute temperature differences between thermocouples and a mercury thermometer.
Thermocouple uncertainty was greater than manufactures’ claims. For all thermocouple models, validity and reliability were better in the Iso-Themex than the Datalogger, but there were no practical differences between models within an electrothermometers. Validity of multi-sensor probes and thermocouples within a probe were not different but were greater than manufacturers’ claims. Reliability of multiprobes and thermocouples within a probe were within manufacturers claims.
Thermocouple models vary in reliability and validity. Scientists should test and report the uncertainty of their equipment rather than depending on manufactures’ claims.