Search Results

You are looking at 101 - 110 of 2,432 items for :

  • "validation" x
Clear All
Restricted access

Katrina D. DuBose, Sandra Edwards, Barbara E. Ainsworth, Jared P. Reis and Martha L. Slattery

Background:

Historical physical activity (PA) questionnaires assess relationships between past PA and chronic diseases. The 4-Corner’s Historical Physical Activity Questionnaire (HPAQ) was validated in 78 middle-age women.

Methods:

In 1996 and 1998, women kept PA records (PAR) for four consecutive days while wearing Caltrac accelerometers. In 2001, the same women recalled their past PA levels using the HPAQ. PA levels from the HPAQ were compared to PARs and the Caltrac. Race-adjusted Spearman correlations determined validity.

Results:

Low to modest correlations existed between PA (min/wk and MET-min/wk) from the HPAQ and PARs for moderate (r = 0.16 and 0.14, respectively), vigorous PA (r = 0.26 and 0.27, respectively; P < 0.05) and moderate-vigorous PA (r = 0.20 and 0.17, respectively). Moderate and moderate-vigorous, but not vigorous PA was positively related to energy expenditure expressed as kilocalories (r = 0.23, P < 0.05 and 0.22, −0.03, respectively) or PA volume (MET-min/wk) (r = 0.29, 0.29, P < 0.05 and 0.10, respectively).

Conclusion:

The HPAQ can produce valid estimates of women’s past moderate and vigorous PA levels.

Restricted access

Leanne Liggett, Andrew Gray, Winsome Parnell, Rob McGee and Yvette McKenzie

Background:

Objective measures, such as accelerometers, are increasingly being used to measure physical activity (PA) levels in children, and the use of validated and reliable instruments is desirable when measuring the effectiveness of programs. The purpose of this study was to determine the validity and reliability of the New Lifestyles NL-1000 accelerometer among preschoolers using a modified version of the Children’s Activity Rating Scale (CARS).

Methods:

Fourteen preschoolers wore the NL-1000 at their waist while the device measured activity levels [in seconds of moderate-to-vigorous physical activity (MVPA)]. They were also videoed for approximately 12 minutes while participating in normal activities at an early childhood center. At approximately 2-minute intervals, activity level readings derived from the NL-1000 were recorded. The video footage was analyzed using a modified CARS technique and the CARS scores compared with data obtained from the accelerometer.

Results:

Within subject reliability was measured using intraclass correlation coefficients (0.58 for CARS and 0.59 for NL-1000). Furthermore, 95% of the variation in CARS could be explained by variation in the accelerometer counts, with 2.4% of the variation being participant-specific.

Conclusion:

The NL-1000 is a sufficiently reliable and valid tool for assessing MVPA in preschoolers.

Restricted access

Todd A. Smitherman, Patricia M. Dubbert, Karen B. Grothe, Jung Hye Sung, Darla E. Kendzor, Jared P. Reis, Barbara E. Ainsworth, Robert L. Newton Jr., Karen T. Lesniak and Herman A. Taylor Jr.

Background:

Physical inactivity has been consistently linked to cardiovascular disease, yet few instruments have been validated for assessment of physical activity in African Americans, a group particularly vulnerable to heart disease. The current study aimed to establish the psychometric properties of the activity survey used in the Jackson Heart Study (JHS) among African Americans, the JHS Physical Activity Cohort survey (JPAC).

Methods:

Test-retest reliability over 2 weeks was assessed using a convenience sample of 40 African Americans. Convergent validity with accelerometer and pedometer data were assessed in 2 samples from the JHS (N = 404 and 294, respectively).

Results:

Test-retest reliability was excellent, with intraclass correlations = .99 for the JPAC total and index scores. Higher JPAC total scores were significantly associated with higher raw accelerometer and pedometer counts. Spearman correlations between JPAC total scores and accelerometer (rho = .24) and pedometer counts (rho = .32) were consistent with these results. Most subscales were significantly correlated with the objective measures. The JPAC total score was most strongly associated with objectively-measured activity.

Conclusion:

This study provides support for the reliability and validity of the JPAC as a tool for assessing physical activity among African Americans across a variety of domains.

Restricted access

Patricia W. Bauer, James M. Pivarnik, Deborah L. Feltz, Nigel Paneth and Christopher J. Womack

Background:

Physical activity (PA) is an important component of a healthy pregnancy and postpartum period. Since prospective PA monitoring throughout gestation is difficult, a valid PA recall tool would be of significant benefit to researchers. The purpose of this study was to evaluate the ability of women to recall their physical activity performed during pregnancy and postpartum, 6 years later.

Methods:

Thirty women participated in an historical PA recall study. Pregnancy PA was monitored carefully via assisted physical activity diary (PAD) 6 years before the current investigation. A Modifiable Activity Questionnaire (MAQ) was used to assess current and past pregnancy PA. The MAQ was administered for each time period in the order of most distant past to most current. Leisure time energy expenditure values (kcal/kg/day) calculated from the PAD and the MAQ were compared.

Results:

MAQ energy expenditure values showed good positive relationships with PAD measures at 20 weeks gestation (r = .57; P < .01), 32 weeks gestation (r = .85; P < .01), and 12 weeks postpartum (r = .86; P < .01). Correlations found were similar to those from previous PA recall and MAQ validation studies using nonpregnant populations.

Conclusions:

The MAQ is an appropriate tool to assess pregnancy and postpartum PA in women 6 years postpartum.

Restricted access

Erin Hanlon and Cynthia Bir

Soccer heading has been studied previously with conflicting results. One major issue is the lack of knowledge regarding what actually occurs biomechanically during soccer heading impacts. The purpose of the current study is to validate a wireless head acceleration measurement system, head impact telemetry system (HITS) that can be used to collect head accelerations during soccer play. The HIT system was fitted to a Hybrid III (HIII) head form that was instrumented with a 3-2-2-2 accelerometer setup. Fifteen impact conditions were tested to simulate impacts commonly experienced during soccer play. Linear and angular acceleration were calculated for both systems and compared. Root mean square (RMS) error and cross correlations were also calculated and compared for both systems. Cross correlation values were very strong with r = .95 ± 0.02 for ball to head forehead impacts and r = .96 ± 0.02 for head to head forehead impacts. The systems showed a strong relationship when comparing RMS error, linear head acceleration, angular head acceleration, and the cross correlation values.

Restricted access

Steven P. Hooker, Anna Feeney, Brent Hutto, Karin A. Pfeiffer, Kerry McIver, Daniel P. Heil, John E. Vena, Michael J. LaMonte and Steven N. Blair

Purpose:

This study was designed to validate the Actical activity monitor in middle-aged and older adults of varying body composition to develop accelerometer thresholds to distinguish between light and moderate intensity physical activity (PA).

Methods:

Nonobese 45 to 64 yr (N = 29), obese 45 to 64 yr (N = 21), and ≥65 yr (N = 23; varying body composition) participants completed laboratory-based sitting, household, and locomotive activities while wearing an Actical monitor and a portable metabolic measurement system. Nonlinear regression analysis was used to identify activity count (AC) cut-points to differentiate between light intensity (<3 METs) and moderate intensity (≥3METs) PA.

Results:

Using group-specific algorithms, AC cut points for 3 METs were 1634, 1107, and 431 for the obese 45 to 64 yr group, nonobese 45 to 64 yr group, and ≥65 yr group, respectively. However, sensitivity and specificity analysis revealed that an AC cut-point of 1065 yielded similar accuracy for detecting an activity as less than or greater than 3 METs, regardless of age and body composition.

Conclusion:

For the Actical activity monitor, an AC cut-point of 1065 can be used to determine light and moderate intensity PA in people ≥45 years of age.

Restricted access

David P. McKee, Colin A.G. Boreham, Marie H. Murphy and Alan M. Nevill

Activity measurement using a uniaxial pedometer was validated against behavioral observation using the Children’s Activity Rating Scale (CARS) in 30 three- to four-year-old children in a nursery school setting. Correlations were calculated for individual children, whereas the relationship for the total group was investigated using multilevel linear regression. The mean counts for boys and girls for the Digiwalker™ were 66.8 (± 64.0) and 47.4 (± 61.3; p < .01) steps per 3 minutes, respectively, whereas the mean CARS scores for boys and girls were 1.8 (± 0.6) and 1.6 (± 0.6; p < .01), respectively. Within-child correlations for CARS versus Digiwalker counts ranged from 0.64 to 0.95 with a median value of 0.86, whereas the multilevel analysis provided strong evidence of a relationship between CARS and Digiwalker (all p < .001). Data from the current study show that gender differences in physical levels exist in very young children and support the utility of the Digiwalker pedometer for assessing physical activity in this age group.

Restricted access

Steven Baumann and Keith Henschen

In recent years, the academic standards of the collegiate student athlete have become a popular subject within the sociology of sport. In January 1983, the top competitive division of the NCAA voted to make more stringent the academic standards for participants in Division I intercollegiate sports. This was known as Proposal 48, and although the vote was 2 to 1 in favor of it, much criticism was also voiced. This study examines the relationship between the American College Testing Program (ACT) and actual grade point average (GPA) for 753 male and female athletes at the University of Utah during a 10-year period. A secondary purpose was to determine the predictive validity of a predicted GPA formula (PGPA) and high school grade point average (HSGPA) as estimates of actual GPA. Other purposes were to determine the correlation of ACT, PGPA, and HSGPA with regard to gender, race, and sport. Pearson product-moment correlations were utilized to establish relationships between ACT scores, PGPA, and HSGPA with actual GPA. A multiple correlation coefficient was computed and a regression equation was established. In addition, a cross-validation was performed on the existing data. Results indicated that an equation combining ACT and HSGPA is the best predictor for Caucasians, while HSGPA alone is the best predictor for non-Caucasians. Factors other than ACT scores appear to be better predictors of academic success for the student-athlete, thus casting doubt upon the validity of Proposal 48 for the NCAA.

Restricted access

Martin E. Block

This paper describes the development and validation of the Children’s Attitudes Toward Integrated Physical Education–Revised (CAIPE-R) inventory, an inventory designed to assess attitudes of children without disabilities toward including peers with disabilities in regular physical education. The CAIPE–R inventory includes a description of a student with disabilities, followed by seven statements regarding including a child with disabilities in regular physical education and five statements regarding specific adaptations to a team sport that would foster inclusion. Users respond to each statement on a 4-point Likert scale. Construct validity using factor analysis, internal consistency, and test-retest reliability was determined on a sample of 44 sixth graders. The CAIPE was revised (CAIPE-R) and given to a second set of subjects (n = 208). Results indicated that the CAIPE-R was a valid and reliable instrument for measuring attitudes of children without disabilities toward including children with disabilities in physical education. Preliminary data on children’s attitudes toward including a student with disabilities in regular physical education are also presented.

Restricted access

Debbe Thompson, Riddhi Bhatt and Kathy Watson

Youth encounter physical activity barriers, often called problems. The purpose of problem solving is to generate solutions to overcome the barriers. Enhancing problem-solving ability may enable youth to be more physically active. Therefore, a method for reliably assessing physical activity problem-solving ability is needed. The purpose of this research was to report the development and initial validation of the physical activity problem-solving inventory for adolescents (PAPSIA). Qualitative and quantitative procedures were used. The social problem-solving inventory for adolescents guided the development of the PAPSIA scale. Youth (14- to 17-year-olds) were recruited using standard procedures, such as distributing flyers in the community and to organizations likely to be attended by adolescents. Cognitive interviews were conducted in person. Adolescents completed pen and paper versions of the questionnaire and/or scales assessing social desirability, self-reported physical activity, and physical activity self-efficacy. An expert panel review, cognitive interviews, and a pilot study (n = 129) established content validity. Construct, concurrent, and predictive validity were also established (n = 520 youth). PAPSIA is a promising measure for assessing youth physical activity problem-solving ability. Future research will assess its validity with objectively measured physical activity.