The \u3ci\u3eStandards\u3c/i\u3e Will Never Be Enough: A Racial Justice Extension

Since 1952, the Standards for Educational and Psychological Testing has provided criteria for developing and evaluating educational and psychological tests and testing practice. Yet, we argue that the foundations, operations, and applications in the Standards are no longer sufficient to meet the current U.S. testing demands for fairness for all test takers. We propose racial justice extensions as principled ways to extend the Standards, through intentional actions focused on race and targeted at educational policies, processes, and outcomes in specific settings. To inform these extensions, we focus on four social-justice concepts: intersectionality derived from Black Feminist Theory; responsibility derived from moral philosophy; disparate impact derived from legal reasoning; and situatedness derived from social learning theories. We demonstrate these extensions and concepts in action by applying them to case studies of nursing licensure and placement testing

Ultralight vector dark matter search using data from the KAGRA O3GK run

Among the various candidates for dark matter (DM), ultralight vector DM can be probed by laser interferometric gravitational wave detectors through the measurement of oscillating length changes in the arm cavities. In this context, KAGRA has a unique feature due to differing compositions of its mirrors, enhancing the signal of vector DM in the length change in the auxiliary channels. Here we present the result of a search for U(1)B−L gauge boson DM using the KAGRA data from auxiliary length channels during the first joint observation run together with GEO600. By applying our search pipeline, which takes into account the stochastic nature of ultralight DM, upper bounds on the coupling strength between the U(1)B−L gauge boson and ordinary matter are obtained for a range of DM masses. While our constraints are less stringent than those derived from previous experiments, this study demonstrates the applicability of our method to the lower-mass vector DM search, which is made difficult in this measurement by the short observation time compared to the auto-correlation time scale of DM

Search for eccentric black hole coalescences during the third observing run of LIGO and Virgo

Despite the growing number of confident binary black hole coalescences observed through gravitational waves so far, the astrophysical origin of these binaries remains uncertain. Orbital eccentricity is one of the clearest tracers of binary formation channels. Identifying binary eccentricity, however, remains challenging due to the limited availability of gravitational waveforms that include effects of eccentricity. Here, we present observational results for a waveform-independent search sensitive to eccentric black hole coalescences, covering the third observing run (O3) of the LIGO and Virgo detectors. We identified no new high-significance candidates beyond those that were already identified with searches focusing on quasi-circular binaries. We determine the sensitivity of our search to high-mass (total mass M>70 M⊙) binaries covering eccentricities up to 0.3 at 15 Hz orbital frequency, and use this to compare model predictions to search results. Assuming all detections are indeed quasi-circular, for our fiducial population model, we place an upper limit for the merger rate density of high-mass binaries with eccentricities 0<e≤0.3 at 0.33 Gpc−3 yr−1 at 90\% confidence level

Search for gravitational-lensing signatures in the full third observing run of the LIGO-Virgo network

Gravitational lensing by massive objects along the line of sight to the source causes distortions of gravitational wave-signals; such distortions may reveal information about fundamental physics, cosmology and astrophysics. In this work, we have extended the search for lensing signatures to all binary black hole events from the third observing run of the LIGO--Virgo network. We search for repeated signals from strong lensing by 1) performing targeted searches for subthreshold signals, 2) calculating the degree of overlap amongst the intrinsic parameters and sky location of pairs of signals, 3) comparing the similarities of the spectrograms amongst pairs of signals, and 4) performing dual-signal Bayesian analysis that takes into account selection effects and astrophysical knowledge. We also search for distortions to the gravitational waveform caused by 1) frequency-independent phase shifts in strongly lensed images, and 2) frequency-dependent modulation of the amplitude and phase due to point masses. None of these searches yields significant evidence for lensing. Finally, we use the non-detection of gravitational-wave lensing to constrain the lensing rate based on the latest merger-rate estimates and the fraction of dark matter composed of compact objects

Analysis of construct comparability in the program for international student assessment, problem-solving measure

In Canada, many large-scale assessments are administered in English and French. The validity of decisions made from using these assessments critically depends on the meaningfulness and comparability of scores from using different versions of assessments. This research study focused on examining (1) the degree of construct comparability and (2) possible sources of incomparability of the Canadian English and French versions of the programme for international student assessment (PISA), 2003 problem-solving measure (PSM). In this study, statistical and qualitative linguistic reviews were used to examine construct comparability and potential sources of incomparability. These procedures sought to (1) determine the degree of comparability of the measure (2) identify if there are items that function differentially and (3) identify the potential sources of differential item functioning in the two language versions of the measure. Evidence from these procedures was used to determine the comparability of the inferences based on test scores from PISA 2003, PSM. A comparative analysis of the two language versions of the measure indicated that there were some psychometric differences at the scale and item level between the two languages which may jeopardize the comparability of assessment results.Education, Faculty ofEducational and Counselling Psychology, and Special Education (ECPS), Department ofGraduat