The Temporal Stability of the National Police Officer Selection Test

1997 ◽  
Vol 81 (3_suppl) ◽  
pp. 1259-1265 ◽  
Author(s):  
Michael S. Henry ◽  
Fred M. Rafilson
Keyword(s):  
Police Officer ◽  
Temporal Stability ◽  
Job Applicants ◽  
Report Writing ◽  
Long Term Stability ◽  
Selection Test ◽  
Test Retest Reliability ◽  
National Police ◽  
Police Officer Selection

The National Police Officer Selection Test is a basic skills test of four subsections: mathematics, reading, grammar, and incident report writing. The purpose was to examine the temporal stability of the test in a sample of job applicants. Test-retest reliability coefficients were computed for a sample of 1215 police officer applicants. Reliability was evident at 17 different test-retest intervals. Also, the reliability of test did not differ significantly between applicants who had passed both times and those who failed both times. The results attest to the reliability and long-term stability of the test.

Transportability of Validity of the National Police Officer Selection Test for a Large Eastern Metropolitan Police Department

1994 ◽  
Vol 75 (2) ◽  
pp. 707-718 ◽  
Author(s):  
Fred M. Rafilson ◽  
Steven P. Allscheid ◽  
Joan G. Weiss
Keyword(s):  
Police Officer ◽  
Police Officers ◽  
Content Validity ◽  
Police Department ◽  
Job Analysis ◽  
Metropolitan Police ◽  
Validity Indices ◽  
Selection Test ◽  
National Police ◽  
Police Officer Selection

This study compared the position of police officers in a large eastern U.S. metropolitan police department to the sample of police officers ( N = 250) used originally to develop and validate the National Police Officer Selection Test (POST). A method was used which provided a basis for conducting studies of the transportability of validity, i.e., studies which demonstrate that test evidence on validity developed in a particular location can be effectively used as evidence of validity in an entirely new location, with other examinations validated using a content validity strategy. Content Validity Indices from the new sample's job analysis ( N = 115) correlated highly ( r = .89) with the original job analysis data ( N = 250). Further analyses indicated no significant differences between samples with regard to ratings of importance of skills identified as essential for successful performance of the police officer's position. Finally, a multivariate approach was used as a more conservative means of comparing job profiles. A discussion of the implications of these findings for making decisions about the transportability of validity is provided.

Seven Criterion-Related Validity Studies Conducted with the National Police Officer Selection Test

1996 ◽  
Vol 78 (1) ◽  
pp. 163-176 ◽  
Author(s):  
Fred Rafilson ◽  
Ray Sison
Keyword(s):  
Law Enforcement ◽  
Police Officer ◽  
Work Performance ◽  
The United States ◽  
Performance Criteria ◽  
Law Enforcement Agencies ◽  
Preemployment Screening ◽  
Selection Test ◽  
National Police ◽  
Police Officer Selection

This is a summary of seven criterion-related validation studies conducted in the United States with The National Police Officer Selection Test (POST), a content-valid, entry-level, basic skills examination used by law enforcement agencies for preemployment screening. Correlations between POST scores and various training and work performance criteria are presented. The results provide additional evidence for the criterion-related validity of the POST as a preemployment selection instrument for law enforcement candidates.

scholarly journals Validity, Test-Retest Reliability and Long-Term Stability of Magnetometer Free Inertial Sensor Based 3D Joint Kinematics

Sensors ◽  
2018 ◽  
Vol 18 (7) ◽  
pp. 1980 ◽  
Author(s):  
Wolfgang Teufl ◽  
Markus Miezal ◽  
Bertram Taetz ◽  
Michael Fröhlich ◽  
Gabriele Bleser
Keyword(s):  
Inertial Sensor ◽  
Joint Kinematics ◽  
Retest Reliability ◽  
Validity Test ◽  
Term Stability ◽  
Long Term Stability ◽  
Test Retest Reliability

scholarly journals CALIBRATION AND STABILITY ANALYSIS OF THE VLP-16 LASER SCANNER

2016 ◽  
Vol XL-3/W4 ◽  
pp. 55-60 ◽  
Author(s):  
C. L. Glennie ◽  
A. Kusari ◽  
A. Facchin
Keyword(s):  
Stability Analysis ◽  
Point Cloud ◽  
Temporal Stability ◽  
Laser Scanner ◽  
Effect Of Temperature ◽  
Geometric Calibration ◽  
Long Term Stability ◽  
The Individual

We report on a calibration and stability analysis of the Velodyne VLP-16 LiDAR scanner. The sensor is evaluated for long-term stability, geometric calibration and the effect of temperature variations. To generalize the results, three separate VLP-16 sensors were examined. The results and conclusions from the analysis of each of the individual sensors was similar. We found that the VLP-16 showed a consistent level of performance, in terms of range bias and noise level over the tested temperature range from 0–40 °C. A geometric calibration was able to marginally improve the accuracy of the VLP-16 point cloud (by approximately 20%) for a single collection, however the temporal stability of the geometric calibration negated this accuracy improvement. Overall, it was found that there is some long-term walk in the ranging observations from individual lasers within the VLP-16, which likely causes the instability in the determination of geometric calibration parameters. However, despite this range walk, the point cloud delivered from the VLP-16 sensors tested showed an accuracy level within the manufacturer specifications of 3 cm RMSE, with an overall estimated RMSE of range residuals between 22 mm and 27 mm.

scholarly journals Temporal stability of chimpanzee social culture

2021 ◽  
Vol 17 (5) ◽  
pp. 20210031
Author(s):  
Edwin J. C. van Leeuwen
Keyword(s):  
Material Culture ◽  
Temporal Stability ◽  
Social Culture ◽  
Human Species ◽  
Arbitrary Group ◽  
Social Conventions ◽  
Long Term Stability ◽  
Group Homogeneity ◽  
Group Compositions

Culture is a hallmark of the human species, both in terms of the transmission of material inventions (e.g. tool manufacturing) and the adherence to social conventions (e.g. greeting mannerisms). While material culture has been reported across the animal kingdom, indications of social culture in animals are limited. Moreover, there is a paucity of evidencing cultural stability in animals. Here, based on a large dataset spanning 12 years, I show that chimpanzees adhere to arbitrary group-specific handclasp preferences that cannot be explained by genetics or the ecological environment. Despite substantial changes in group compositions across the study period, and all chimpanzees having several behavioural variants in their repertoires, chimpanzees showed and maintained the within-group homogeneity and between-group heterogeneity that are so characteristic of the cultural phenomenon in the human species. These findings indicate that human culture, including its arbitrary social conventions and long-term stability, is rooted in our evolutionary history.

Psychometric assessment of workaholism measures

2013 ◽  
Vol 29 (1) ◽  
pp. 7-24 ◽  
Author(s):  
Cecilie Schou Andreassen ◽  
Jørn Hetland ◽  
Ståle Pallesen
Keyword(s):  
Cross Validation ◽  
Temporal Stability ◽  
Self Report ◽  
Factor Solution ◽  
Work Addiction ◽  
Content Type ◽  
Addiction Risk ◽  
Test Retest Reliability ◽  
Practical Implications

Purpose – Although the concept of workaholism has existed in the academic literature for decades, exploration of its measurements seems to lag behind. The purpose of this study is to present an investigation of the three most commonly used workaholism measures; the Workaholism Battery (WorkBAT), the Work Addiction Risk Test (WART) and the Dutch Work Addiction Scale (DUWAS) in terms of their cross-validation, their temporal stability and their factor structure. Design/methodology/approach – The three measures were administered to 661 cross-occupational Norwegian workers. A total of 368 of these completed the same measures 24-30 months later. Findings – The cross-validation showed that the correlations between the scores of the different instruments were too low to conclude that they measure the same construct. The 24-30 month test-retest reliability coefficients for the measures revealed that the scores were quite stable over time. None of the previously suggested factor solutions for the three measures had a good fit with the data. Explorative factor analyses supported a four-factor solution for the WorkBAT and for the WART. A two-factor solution for the DUWAS was found. Research limitations/implications – All the data are based on self-report, which might bias the results. Practical implications – Different workaholism measures cannot be used interchangeably. Originality/value – This is the first study that cross-validates the three most used workaholism measures and which investigates the reliability of these instruments over a long-term period (24-30 months).

Measuring Service Learning Outcomes: Test-Retest Reliability of Four Scales

2010 ◽  
Vol 107 (2) ◽  
pp. 611-616 ◽  
Author(s):  
James E. Weber ◽  
Paula S. Weber ◽  
Margaret A. Young
Keyword(s):  
Service Learning ◽  
Learning Outcomes ◽  
Civic Participation ◽  
Social Issues ◽  
Retest Reliability ◽  
Term Stability ◽  
Long Term Stability ◽  
Helping Others ◽  
Test Retest Reliability

Previous research efforts have developed and validated various scales potentially useful in evaluating service learning outcomes. The developmental efforts reported for the four scales examined in this study did not include the test-retest reliabilities that would provide assurance to service learning researchers of the long-term stability and therefore usefulness of these measures. Summary estimates of 13-wk. test-retest reliabilities for the scales Civic Participation, Self-efficacy Toward Service, Attitude Toward Helping Others, and College Education's Role in Addressing Social Issues provide service learning researchers with evidence of stability of the scales over the typical duration of service learning courses.

scholarly journals CALIBRATION AND STABILITY ANALYSIS OF THE VLP-16 LASER SCANNER

2016 ◽  
Vol XL-3/W4 ◽  
pp. 55-60 ◽  
Author(s):  
C. L. Glennie ◽  
A. Kusari ◽  
A. Facchin
Keyword(s):  
Stability Analysis ◽  
Point Cloud ◽  
Temporal Stability ◽  
Laser Scanner ◽  
Effect Of Temperature ◽  
Geometric Calibration ◽  
Long Term Stability ◽  
The Individual

We report on a calibration and stability analysis of the Velodyne VLP-16 LiDAR scanner. The sensor is evaluated for long-term stability, geometric calibration and the effect of temperature variations. To generalize the results, three separate VLP-16 sensors were examined. The results and conclusions from the analysis of each of the individual sensors was similar. We found that the VLP-16 showed a consistent level of performance, in terms of range bias and noise level over the tested temperature range from 0–40 °C. A geometric calibration was able to marginally improve the accuracy of the VLP-16 point cloud (by approximately 20%) for a single collection, however the temporal stability of the geometric calibration negated this accuracy improvement. Overall, it was found that there is some long-term walk in the ranging observations from individual lasers within the VLP-16, which likely causes the instability in the determination of geometric calibration parameters. However, despite this range walk, the point cloud delivered from the VLP-16 sensors tested showed an accuracy level within the manufacturer specifications of 3 cm RMSE, with an overall estimated RMSE of range residuals between 22 mm and 27 mm.

scholarly journals MIPAS IMK/IAA CFC-11 (CCl<sub>3</sub>F) and CFC-12 (CCl<sub>2</sub>F<sub>2</sub>) measurements: accuracy, precision and long-term stability

2015 ◽  
Vol 8 (7) ◽  
pp. 7573-7662 ◽  
Author(s):  
E. Eckert ◽  
A. Laeng ◽  
S. Lossow ◽  
S. Kellmann ◽  
G. Stiller ◽  
...  
Keyword(s):  
Spectral Resolution ◽  
Atmospheric Chemistry ◽  
Michelson Interferometer ◽  
Temporal Stability ◽  
High Spectral Resolution ◽  
Long Term Stability ◽  
Trace Species ◽  
High Bias ◽  
Institute Of Technology

Abstract. Profiles of CFC-11 (CCl3F) and CFC-12 (CCl2F2) of the Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) abord the European satellite Envisat have been retrieved from versions MIPAS/4.61–MIPAS/4.62 and MIPAS/5.02–MIPAS/5.06 level-1b data using the scientific level-2 processor run by Karlsruhe Institute of Technology (KIT), Institute of Meteorology and Climate Research (IMK) and Consejo Superior de Investigaciones Científicas (CSIC), Instituto de Astrofísica de Andalucía (IAA). These profiles have been compared to measurements taken by the balloon borne Cryosampler, Mark IV (MkIV) and MIPAS-Balloon (MIPAS-B), the airborne MIPAS stratospheric aircraft (MIPAS-STR), the satellite borne Atmospheric Chemistry Experiment Fourier transform spectrometer (ACE-FTS) and the High Resolution Dynamic Limb Sounder (HIRDLS) as well as the ground based Halocarbon and other Atmospheric Trace Species (HATS) network for the reduced spectral resolution period (RR: January 2005–April 2012) of MIPAS Envisat. ACE-FTS, MkIV and HATS also provide measurements during the high spectral resolution period (FR: July 2002–March 2004) and were used to validate MIPAS Envisat CFC-11 and CFC-12 products during that time, as well as ILAS-II profiles. In general, we find that MIPAS Envisat shows slightly higher values for CFC-11 at the lower end of the profiles (below ~ 15 km) and in a comparison of HATS ground-based data and MIPAS Envisat measurements at 3 km below the tropopause. Differences range from approximately 10–50 pptv (~ 5–20 %) during the RR period. In general, differences are slightly smaller for the FR period. An indication of a slight high-bias at the lower end of the profile exists for CFC-12 as well, but this bias is far less pronounced than for CFC-11, so that differences at the lower end of the profile (below ~ 15 km) and in the comparison of HATS and MIPAS Envisat measurements taken at 3 km below the tropopause mainly stay within 10–50 pptv (~ 2–10 %) for the RR and the FR period. Above approximately 15 km, most comparisons are close to excellent, apart from ILAS-II, which shows large differences above ~ 17 km. Overall, percentage differences are usually smaller for CFC-12 than for CFC-11. For both species – CFC-11 and CFC-12 – we find that differences at the lower end of the profile tend to be larger at higher latitudes than in tropical and subtropical regions. In addition, MIPAS Envisat profiles have a maximum in the mixing ratio around the tropopause, which is most obvious in tropical mean profiles. Estimated measurement noise alone can, in most cases, not explain the standard deviation of the differences. This is attributed to error components not considered in the error estimate and also to natural variability which always plays a role when the compared instruments do not measure exactly the same air mass. Investigations concerning the temporal stability show very small negative drifts in MIPAS Envisat CFC-11 measurements. These drifts vary between ~ 1–3 % decade−1. For CFC-12, the drifts are also negative and close to zero up to ~ 30 km. Above that altitude larger drifts of up to ~ 50 % decade−1 appear which are negative up to ~ 35 km and positive, but of a similar magnitude, above.

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