TY - JOUR A1 - Heffner, Christopher C. A1 - Fuhrmeister, Pamela A1 - Luthra, Sahil A1 - Mechtenberg, Hannah A1 - Saltzman, David A1 - Myers, Emily B. T1 - Reliability and validity for perceptual flexibility in speech JF - Brain and language : a journal of clinical, experimental and theoretical research N2 - The study of perceptual flexibility in speech depends on a variety of tasks that feature a large degree of variability between participants. Of critical interest is whether measures are consistent within an individual or across stimulus contexts. This is particularly key for individual difference designs that are deployed to examine the neural basis or clinical consequences of perceptual flexibility. In the present set of experiments, we assess the split-half reliability and construct validity of five measures of perceptual flexibility: three of learning in a native language context (e.g., understanding someone with a foreign accent) and two of learning in a non-native context (e.g., learning to categorize non-native speech sounds). We find that most of these tasks show an appreciable level of split-half reliability, although construct validity was sometimes weak. This provides good evidence for reliability for these tasks, while highlighting possible upper limits on expected effect sizes involving each measure. KW - Reliability KW - Construct validity KW - Individual differences KW - Speech KW - perception KW - Phonetic identification KW - Phonetic learning KW - Phonetic KW - adaptation Y1 - 2022 U6 - https://doi.org/10.1016/j.bandl.2021.105070 SN - 0093-934X SN - 1090-2155 VL - 226 PB - Elsevier CY - Amsterdam [u.a.] ER - TY - JOUR A1 - Malesza, Marta T1 - The reduced discounting inventory BT - construction and initial validation JF - Current psychology N2 - In two studies, the aim of this research was to develop and validate a Polish version of the reduced Discounting Inventory. In Study 1 (N = 623) items extraction from the 48-item DI was based upon item-total correlation and items with highest coefficients were considered. The reduced Discounting Inventory resulted in sixteen items. Cronbach's a coefficient was .78, and the item-total correlations ranged between .59 and .77. The correlation between Polish versions of reduced Discounting Inventory and longer 48-item Discounting Inventory was .85. Next, the reduced Discounting Inventory was evaluated in terms of factorial and construct validity. The structure of the instrument was analysed by Confirmatory Factor Analyses procedure. It indicated that the four-factor structure had the best fit to the data. Additionally, we show that this reduced Discounting Inventory closely parallels the longer 48-item inventory its relation to traditional discounting measures using pairs of hypothetical choices (expect for the delay discounting subscale). Finally, in study 2, the test-retest reliability of the reduced Discounting Inventory over a 3-month interval was assessed (247 subjects of the 623 individuals who participated in Study 1). Results indicated good stability of the reduced measure (>= .88). It is concluded that the reduced Discounting Inventory has notable psychometric properties and that it can serve as an alternative measure of discounting when situations do not allow the use of longer inventories. KW - Discounting inventory KW - Reduced measure KW - Reliability KW - Validity Y1 - 2018 SN - 1046-1310 SN - 1936-4733 VL - 40 IS - 2 SP - 545 EP - 552 PB - Springer CY - New York ER - TY - JOUR A1 - Malesza, Marta A1 - Ostaszewski, Paweł A1 - Büchner, Susanne A1 - Kaczmarek, Magdalena C. T1 - The adaptation of the Short Dark Triad personality measure BT - psychometric properties of a German sample JF - Current psychology N2 - This research was designed to adapt and investigate the psychometric properties of the Short Dark Triad measure (Jones and Paulhus Assessment, 21(1), 28-41, 2014) in a German sample within four studies (total N=1463); the measure evaluates three personality dimensions: narcissism, psychopathy, and Machiavellianism. The structure of the instrument was analysed by Confirmatory Factor Analyses procedure. It indicated that the three-factor structure had the best fit to the data. Next, the Short Dark Triad measure was evaluated in terms of construct, convergent and discriminant validity, internal consistency ( .72), and test-retest reliability during a 4-week period ( .73). Concurrent validity of the SD3 was supported by relating its subscales to measures of the Big Five concept, aggression, and self-esteem. We concluded that the Short Dark Triad instrument presented high cross-language replicability. The use of this short inventory in the investigation of the Dark Triad personality model in the German language context is suggested. KW - Short dark triad KW - SD3 KW - Adaptation KW - Reliability KW - Validity Y1 - 2019 U6 - https://doi.org/10.1007/s12144-017-9662-0 SN - 1046-1310 SN - 1936-4733 VL - 38 IS - 3 SP - 855 EP - 864 PB - Springer CY - New York ER - TY - JOUR A1 - Koelman, Liselot A. A1 - Pivovarova-Ramich, Olga A1 - Pfeiffer, Andreas F. H. A1 - Grune, Tilman A1 - Aleksandrova, Krasimira T1 - Cytokines for evaluation of chronic inflammatory status in ageing research BT - reliability and phenotypic characterisation JF - Immunity & Ageing N2 - Background: There is a growing interest in the role of inflammageing for chronic disease development. Cytokines are potent soluble immune mediators that can be used as target biomarkers of inflammageing; however, their measurement in human samples has been challenging. This study aimed to assess the reliability of a pro- and anti-inflammatory cytokine panel in a sample of healthy people measured with a novel electrochemiluminescent multiplex immunoassay platform (Meso Scale Discovery, MSD), and to characterize their associations with metabolic and inflammatory phenotypes. KW - Reliability KW - Cytokines KW - Multiplex platforms KW - Inflammaging KW - Biomarkers KW - Ageing KW - BMI Y1 - 2019 U6 - https://doi.org/10.1186/s12979-019-0151-1 SN - 1742-4933 VL - 16 PB - BMC CY - London ER - TY - JOUR A1 - Engel, Tilman A1 - Mueller, Juliane A1 - Kopinski, Stephan A1 - Reschke, Antje A1 - Mueller, Steffen A1 - Mayer, Frank T1 - Unexpected walking perturbations: Reliability and validity of a new treadmill protocol to provoke muscular reflex activities at lower extremities and the trunk JF - Journal of biomechanics N2 - Instrumented treadmills offer the potential to generate standardized walking perturbations, which are particularly rapid and powerful. However, technical requirements to release adequate perturbations regarding timing, duration and amplitude are demanding. This study investigated the test-retest reliability and validity of a new treadmill perturbation protocol releasing rapid and unexpected belt perturbations to provoke muscular reflex responses at lower extremities and the trunk. Fourteen healthy participants underwent two identical treadmill walking protocols, consisting of 10 superimposed one-sided belt perturbations (100 ms duration; 2 m/s amplitude), triggered by a plantar pressure insole 200 ms after heel contact. Delay, duration and amplitude of applied perturbations were recorded by 3D-motion capture. Muscular reflex responses (within 200 ms) were measured at lower extremities and the trunk (10-lead EMG). Data was analyzed descriptively (mean +/- SD). Reliability was analyzed using test-retest variability (TRV%) and limits of agreement (LoA, bias +/- 1.96*SD). Perturbation delay was 202 14 ms, duration was 102 +/- 4 ms and amplitude was 2.1 +/- 0.01 m/s. TRV for perturbation delay, duration and amplitude ranged from 5.0% to 5.7%. LoA reached 3 +/- 36 ms for delay, 2 +/- 13 ms for duration and 0.0 +/- 0.3 m/s for amplitude. EMG amplitudes following perturbations ranged between 106 +/- 97% and 909 +/- 979% of unperturbed gait and EMG latencies between 82 +/- 14 ms and 106 +/- 16 ms. Minor differences between preset and observed perturbation characteristics and results of test-retest analysis prove a high validity with excellent reliability of the setup. Therefore, the protocol tested can be recommended to provoke muscular reflex responses at lower extremities and the trunk in perturbed walking. (C) 2017 Elsevier Ltd. All rights reserved. KW - Perturbation KW - Stumbling KW - Gait KW - Treadmill KW - Reliability KW - MiSpEx Y1 - 2017 U6 - https://doi.org/10.1016/j.jbiomech.2017.02.026 SN - 0021-9290 SN - 1873-2380 VL - 55 SP - 152 EP - 155 PB - Elsevier CY - Oxford ER - TY - JOUR A1 - Silveira, Raul De Souza A1 - Carlsohn, Anja A1 - Langen, Georg A1 - Mayer, Frank A1 - Scharhag-Rosenberger, Friederike T1 - Reliability and day-to-day variability of peak fat oxidation during treadmill ergometry JF - Journal of the International Society of Sports Nutrition N2 - Background: Exercising at intensities where fat oxidation rates are high has been shown to induce metabolic benefits in recreational and health-oriented sportsmen. The exercise intensity (Fat(peak)) eliciting peak fat oxidation rates is therefore of particular interest when aiming to prescribe exercise for the purpose of fat oxidation and related metabolic effects. Although running and walking are feasible and popular among the target population, no reliable protocols are available to assess Fat(peak) as well as its actual velocity (VPFO) during treadmill ergometry. Our purpose was therefore, to assess the reliability and day-to-day variability of VPFO and Fat(peak) during treadmill ergometry running. Conclusion: In summary, relative and absolute reliability indicators for V-PFO and Fat(peak) were found to be excellent. The observed LoA may now serve as a basis for future training prescriptions, although fat oxidation rates at prolonged exercise bouts at this intensity still need to be investigated. KW - Peak fat oxidation KW - Reliability KW - Variability KW - Running KW - Treadmill ergometry Y1 - 2016 U6 - https://doi.org/10.1186/s12970-016-0115-1 SN - 1550-2783 VL - 13 PB - BioMed Central CY - London ER -