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Brown MI, Heck PR, Chabris CF. The Social Shapes Test as a Self-Administered, Online Measure of Social Intelligence: Two Studies with Typically Developing Adults and Adults with Autism Spectrum Disorder. J Autism Dev Disord 2023:10.1007/s10803-023-05901-2. [PMID: 36757539 PMCID: PMC9909157 DOI: 10.1007/s10803-023-05901-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/11/2023] [Indexed: 02/10/2023]
Abstract
The Social Shapes Test (SST) is a measure of social intelligence which does not use human faces or rely on extensive verbal ability. The SST has shown promising validity among adults without autism spectrum disorder (ASD), but it is uncertain whether it is suitable for adults with ASD. We find measurement invariance between adults with (n = 229) or without ASD (n = 1,049) on the 23-item SST. We also find that adults without ASD score higher on the SST than adults with ASD (d = 0.21). We also provide two, 14-item versions which demonstrated good parallel test-retest reliability and are positively related to scores on the Frith-Happé task. The SST is suitable for remote, online research studies.
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Affiliation(s)
- Matt I Brown
- Geisinger Health System, Lewisburg, PA, USA.
- Human Resources Research Organization, 66 Canal Center Plaza, Suite 700, 22314, Alexandria, VA, USA.
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Brown MI, Grossenbacher MA, Warman Z. Self-selection as an explanation for general mental ability test score differences between mobile and nonmobile devices in observational studies. Journal of Applied Psychology 2022:2023-22384-001. [DOI: 10.1037/apl0001067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022] Open
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Brown MI, Speer AB, Tenbrink AP, Chabris CF. Using game-like animations of geometric shapes to simulate social interactions: An evaluation of group score differences. Int J Sel Assess 2022; 30:167-181. [PMID: 35935096 PMCID: PMC9355331 DOI: 10.1111/ijsa.12375] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
This study introduces a novel, game-like method for measuring social intelligence: the Social Shapes Test. Unlike other existing video or game-based tests, the Shapes Test uses animations of abstract shapes to represent social interactions. We explore demographic differences in Shapes Test scores compared to a written situational judgment test. Gender and race/ethnicity only had meaningful effects on written SJT scores while no effects were found for Shapes Test scores. This pattern of results remained after controlling for general mental ability and English language exposure. We also found metric invariance between demographic groups for both tests. Our results demonstrate the potential for using animated shape tasks as an alternative to written SJTs when designing future game-based assessments.
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Affiliation(s)
- Matt I. Brown
- Geisinger Health System, Autism and Developmental Medicine Institute, Lewisburg, PA
| | - Andrew B. Speer
- Wayne State University, Department of Psychology, Detroit, MI
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Brown MI, Grossenbacher MA, Martin‐Raugh MP, Kochert J, Prewett MS. Can you crowdsource expertise? Comparing expert and crowd‐based scoring keys for three situational judgment tests. Int J Sel Assess 2021. [DOI: 10.1111/ijsa.12353] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Affiliation(s)
| | | | | | - Jonathan Kochert
- U.S. Army Research Institute for the Behavioral and Social Sciences Fort Belvoir Virginia USA
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Wai J, Brown MI. Developmental Histories Facilitating the Emergence of Creative Scientific Expertise: The Role of Developed Cognitive Talents, Education, and Social and Cultural Contexts. Front Psychol 2021; 12:716529. [PMID: 34539517 PMCID: PMC8446382 DOI: 10.3389/fpsyg.2021.716529] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Accepted: 08/11/2021] [Indexed: 11/13/2022] Open
Abstract
Understanding how individual and contextual factors collectively contribute to the developmental histories that facilitate the emergence of creative expertise in science is improved by considering the contribution of the broad structure of developed cognitive abilities to creativity, prospective research on the high achieving or gifted students who may choose careers in and end up as creative scientists later in life, as well as retrospective studies of established creative scientists themselves and what their educational histories reveal. We first review and elaborate on these connections as documented in research which explore the development of talent, including cognitive mechanisms that include math and spatial reasoning and science related educational opportunities. We propose a research thought experiment that utilizes the multi-trait, multi-method matrix, and bifactor modeling to help understand the true overlap between measurement structures of cognitive and creative aptitudes. Then we explore the social and cultural contexts that may facilitate and/or hinder creative solutions in science through the lens of how these ecosystems influence talent development for gifted students and also the production of elite scientists. Based on this review, some policies will be suggested that may enhance the development of scientific creativity and broader societal innovation and expand the pipeline to include and fully develop the talents of disadvantaged students and provide nurturing environments to improve the likelihood of the emergence of scientific creative expertise.
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Affiliation(s)
- Jonathan Wai
- Department of Education Reform and Department of Psychology, University of Arkansas, Fayetteville, AR, United States
| | - Matt I Brown
- Autism and Developmental Medicine Institute, Geisinger Health System, Lewisburg, PA, United States
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Brown MI. Does Action Planning Create More Harm Than Good? Common Challenges in the Practice of Action Planning After Employee Surveys. The Journal of Applied Behavioral Science 2021. [DOI: 10.1177/00218863211007555] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Despite the popularity of employee surveys in practice, there has been little research to determine how leaders and managers can effectively take action based on survey results. Without a foundation for evidence-based practice, many organizations rely on action planning processes where individual managers are tasked with developing plans to improve attitudes and perceptions among their subordinates. Although action plans are easy to quantify and monitor, it is unclear whether they are useful for creating change. Action planning is often rated as least favorable among other aspects of employee survey programs. Managers may lack the capability to actively change the causes of dissatisfaction among their subordinates. At worst, managers may grow to perceive action planning as a meaningless, box-checking task. This potentially acts to demotivate and demoralize managers while also increasing pessimism toward future surveys. This article provides several suggestions to avoid these potential pitfalls when designing and implementing employee surveys.
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Abstract
In 1944, Heider and Simmel reported that observers could perceive simple animated geometric shapes as characters with emotions, intentions, and other social attributes. This work has been cited over 3000 times and has had wide and ongoing influence on the study of social cognition and social intelligence. However, many researchers in this area have continued to use the original Heider and Simmel black-and-white video. We asked whether the original findings could be reproduced 75 years later by creating 32 new colored animated shape videos designed to depict various social plots and testing whether they can evoke similar spontaneous social attributions. Participants (N = 66) viewed our videos and were asked to write narratives which we coded for indicia of different types of social attributions. Consistent with Heider and Simmel, we found that participants spontaneously attributed social meaning to the videos. We observed that responses to our videos were also similar to responses to the original video reported by Klin (2000), despite being only 13-23 s and portraying a broader range of social plots. Participants varied in how many social attributions they made in response, and the videos varied in how much they elicited such responses. Our set of animated shape videos is freely available online for all researchers to use and forms the basis of a multiple-choice assessment of social intelligence (Brown et al., 2019).
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Affiliation(s)
- Adrianna Ratajska
- Department of Clinical and Health Psychology, University of Florida, Gainesville, FL
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Brown MI, Wai J, Chabris CF. Can You Ever Be Too Smart for Your Own Good? Comparing Linear and Nonlinear Effects of Cognitive Ability on Life Outcomes. Perspect Psychol Sci 2021; 16:1337-1359. [PMID: 33682520 DOI: 10.1177/1745691620964122] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Despite a long-standing expert consensus about the importance of cognitive ability for life outcomes, contrary views continue to proliferate in scholarly and popular literature. This divergence of beliefs presents an obstacle for evidence-based policymaking and decision-making in a variety of settings. One commonly held idea is that greater cognitive ability does not matter or is actually harmful beyond a certain point (sometimes stated as > 100 or 120 IQ points). We empirically tested these notions using data from four longitudinal, representative cohort studies comprising 48,558 participants in the United States and United Kingdom from 1957 to the present. We found that ability measured in youth has a positive association with most occupational, educational, health, and social outcomes later in life. Most effects were characterized by a moderate to strong linear trend or a practically null effect (mean R2 range = .002-.256). Nearly all nonlinear effects were practically insignificant in magnitude (mean incremental R2 = .001) or were not replicated across cohorts or survey waves. We found no support for any downside to higher ability and no evidence for a threshold beyond which greater scores cease to be beneficial. Thus, greater cognitive ability is generally advantageous-and virtually never detrimental.
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Affiliation(s)
- Matt I Brown
- Autism and Developmental Medicine Institute, Geisinger Health System, Lewisburg, Pennsylvania
| | - Jonathan Wai
- Department of Education Reform, Department of Psychology, University of Arkansas
| | - Christopher F Chabris
- Autism and Developmental Medicine Institute, Geisinger Health System, Lewisburg, Pennsylvania
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Brown MI, Prewett MS, Grossenbacher MA. Distancing ourselves from geographic dispersion: An examination of perceived virtuality in teams. Group Dynamics: Theory, Research, and Practice 2020. [DOI: 10.1037/gdn0000120] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Brown MI, Ratajska A, Hughes SL, Fishman JB, Huerta E, Chabris CF. The social shapes test: A new measure of social intelligence, mentalizing, and theory of mind. Personality and Individual Differences 2019. [DOI: 10.1016/j.paid.2019.01.035] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Wai J, Brown MI, Chabris CF. Using Standardized Test Scores to Include General Cognitive Ability in Education Research and Policy. J Intell 2018; 6:E37. [PMID: 31162464 PMCID: PMC6480800 DOI: 10.3390/jintelligence6030037] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Revised: 07/16/2018] [Accepted: 07/27/2018] [Indexed: 11/16/2022] Open
Abstract
In education research and education policy, much attention is paid to schools, curricula, and teachers, but little attention is paid to the characteristics of students. Differences in general cognitive ability (g) are often overlooked as a source of important variance among schools and in outcomes among students within schools. Standardized test scores such as the SAT and ACT are reasonably good proxies for g and are available for most incoming college students. Though the idea of g being important in education is quite old, we present contemporary evidence that colleges and universities in the United States vary considerably in the average cognitive ability of their students, which correlates strongly with other methods (including international methods) of ranking colleges. We also show that these g differences are reflected in the extent to which graduates of colleges are represented in various high-status and high-income occupations. Finally, we show how including individual-level measures of cognitive ability can substantially increase the statistical power of experiments designed to measure educational treatment effects. We conclude that education policy researchers should give more consideration to the concept of individual differences in cognitive ability as well as other factors.
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Affiliation(s)
- Jonathan Wai
- Department of Education Reform, University of Arkansas, Fayetteville, AR 72701, USA.
| | - Matt I Brown
- Autism & Developmental Medicine Institute, Geisinger Health System, Lewisburg, PA 17837, USA.
| | - Christopher F Chabris
- Autism & Developmental Medicine Institute, Geisinger Health System, Lewisburg, PA 17837, USA.
- Institute for Advanced Study in Toulouse, 31015 Toulouse, France.
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Hart SP, Brown MI, Gaddie J. Progressive pneumonia complicating steroid-dependent asthma. Scott Med J 2001; 46:114. [PMID: 11676041 DOI: 10.1177/003693300104600408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
We describe a patient who developed pulmonary nocardiosis whilst taking long term oral steroids for asthma. Nocardiosis is more common than is generally appreciated by clinicians, is notoriously difficult to diagnose, and is associated with significant mortality. This patient developed progressive pneumonia despite antibiotic therapy, which is typical of pulmonary nocardiosis. It is important to consider this treatable condition in the differential diagnosis of pneumonia.
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Affiliation(s)
- S P Hart
- Borders General Hospital, Melrose, Roxburghshire.
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Tsiantis M, Brown MI, Skibinski G, Langdale JA. Disruption of auxin transport is associated with aberrant leaf development in maize. Plant Physiol 1999; 121:1163-8. [PMID: 10594103 PMCID: PMC59483 DOI: 10.1104/pp.121.4.1163] [Citation(s) in RCA: 47] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/1999] [Accepted: 09/02/1999] [Indexed: 05/19/2023]
Abstract
Despite recent progress, the mechanisms governing shoot morphogenesis in higher plants are only partially understood. Classical physiological studies have suggested that gradients of the plant growth regulator auxin may play a role in controlling tissue differentiation in shoots. More recent molecular genetic studies have also identified knotted1 like homeobox (knox) genes as important regulators of shoot development. The maize (Zea mays L.) mutant rough sheath2 (rs2) displays ectopic expression of at least three knox genes and consequently conditions a range of shoot and leaf phenotypes, including aberrant vascular development, ligular displacements, and dwarfism (R. Schneeberger, M. Tsiantis, M. Freeling, J.A. Langdale [1998] Development 125: 2857-2865). In this report, we show that rs2 mutants also display decreased polar auxin transport in the shoot. We also demonstrate that germination of wild-type maize seedlings on agents known to inhibit polar auxin transport mimics aspects of the rs2 mutant phenotype. The phenotype elaborated in inhibitor-treated plants is not correlated with ectopic KNOX protein accumulation.
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Affiliation(s)
- M Tsiantis
- Department of Plant Sciences, University of Oxford, South Parks Road, Oxford, OX1 3RB United Kingdom
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Lowles IE, Brown MI. A search for Chlamydia psittaci in products of conception. J Infect 1998; 36:135. [PMID: 9515693 DOI: 10.1016/s0163-4453(98)93990-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Abstract
Questionnaires (3426; 72.8%) and blood samples (3890; 82.6%) were analysed from 4704 women post-natally. The answers to the questionnaire confirmed that those patients living in areas with the highest percentage employed in agriculture were most likely to be in direct or indirect contact with sheep or sheep products. When the 788 (20.3%) of the sera with group specific antibody were examined for type-specific antibody, 291 (7.5%) reacted with Chlamydia trachomatis, 153 (3.9%) with Chlamydia pneumoniae, but only one (0.03%) with Chlamydia psittaci. Thus, it would appear that C. psittaci was not an important pathogen in this survey, despite the largest proportion of blood samples being submitted from those most likely to be employed in agriculture. However, in the course of this survey the three patients who had previously suffered chlamydia-associated abortion had successful pregnancies and submitted blood specimens. Serological studies on the serial bloods from these patients showed that, despite developing antibody to the C. psittaci pool and the ovine abortion strain of C. psittaci following abortion, this antibody waned. At the time of the subsequent successful pregnancy, serological results would not have detected a previous C. psittaci infection, but one due to C. pneumoniae. Thus, the results of a survey such as this must be interpreted with caution.
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Affiliation(s)
- I W Smith
- Department of Medical Microbiology, University Medical School, Edinburgh, UK
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Abstract
High-dose trimethoprim-sulfamethoxazole (TMP-SMX) causes hyperkalemia, thought to result from TMP-induced blockade of amiloride-sensitive Na(+)-channels in the distal nephron. The present study was performed in anesthetized dogs to determine if increasing distal sodium delivery affects this antikaliuretic effect. In Group 1, intrarenal infusion of vehicle did not alter renal function. In Group 2, i.v. infusion of amiloride led to diuresis, natriuresis and antikaliuresis associated with a reduction of the transtubular potassium gradient (TTKG) in both kidneys. Intrarenal infusion of TMP (0.2 mg/kg/min) into the left kidney did not further alter these parameters. In groups 3 and 4, intrarenal infusion of TMP caused an ipsilateral diuresis, natriuresis, antikaliuresis and a reduction in (TTKG) without affecting the contralateral kidney. The TMP infusion was followed by furosemide (20 mg i.v.) in group 3 and acute saline loading in group 4. Despite continuous TMP infusion, both furosemide and saline loading reversed the antikaliuretic effect of TMP in the ipsilateral kidney and was associated with a similar kaliuresis, diuresis, natriuresis and decrease in urine osmolality in both kidneys. The TTKG following furosemide or saline loading increased in the ipsilateral kidney and decreased in the contralateral kidney. In all groups the systemic and renal hemodynamics remained unchanged. These results suggest that acute administration of TMP inhibits the amiloride-sensitive Na(+)-channel and K+ secretion in the distal nephron. Maneuvers that increase distal Na+ delivery can abrogate TMP's antikaliuretic effect due, in part, to an increase of the low TTKG observed with TMP.
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Affiliation(s)
- I W Reiser
- Division of Nephrology and Hypertension, Brookdale University Hospital and Medical Center, Brooklyn, New York, USA
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Brewster DH, Brown MI, Robertson D, Houghton GL, Bimson J, Sharp JC. An outbreak of Escherichia coli O157 associated with a children's paddling pool. Epidemiol Infect 1994; 112:441-7. [PMID: 8005210 PMCID: PMC2271503 DOI: 10.1017/s0950268800051141] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
In May 1992, a small, circumscribed community outbreak of infection due to verotoxin-producing Escherichia coli O157 phage type 49 occurred in a semi-rural area of south-east Scotland. On the basis of stool cultures, six cases were identified, one of whom was asymptomatic. One child developed the haemolytic uraemic syndrome. Although the source of infection of the index case was not established nor could the extent of person-to-person spread be fully determined, the clinical, microbiological and epidemiological evidence available indicated that a children's paddling pool served as the focal point in the transmission of infection causing the outbreak.
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Affiliation(s)
- D H Brewster
- Department of Public Health, Borders Health Board, Melrose
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Logie AW, Logie DE, Brown MI, Frame A, Norris CA, Mitchell LIS, Fingland IW, Fingland MJ, Knox AM, Knox WA, Cameron CH. Anniversary of Hiroshima. West J Med 1985. [DOI: 10.1136/bmj.291.6491.350-c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Prough RA, Brown MI, Dannan GA, Guengerich FP. Major isozymes of rat liver microsomal cytochrome P-450 involved in the N-oxidation of N-isopropyl-alpha-(2-methylazo)-p-toluamide, the azo derivative of procarbazine. Cancer Res 1984; 44:543-8. [PMID: 6692359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Seven isozymes of cytochrome P-450 were tested to establish whether they could N-oxidize azoprocarbazine to form the two isomeric azoxy metabolites after optimizing the reconstitution of various purified isozymes with regard to substrate concentration, exogenous lipid, and reduced nicotinamide adenine dinucleotide phosphate-cytochrome c (P-450) reductase concentration. Two isozymes, cytochromes P-450PB-C (an isozyme present in untreated rats or in rats treated with phenobarbital or beta-naphthoflavone) and P-450 beta NF-B (the major beta-naphthoflavone-induced isozyme), had appreciable turnover numbers for the N-oxidation reaction. The product ratio [N-isopropyl-alpha-(methyl-ONN-azoxy)-p-toluamide formation relative to N-isopropyl-alpha-(methyl-NNO-azoxy)-p-toluamide formation] obtained with cytochrome P-450PB-C was nearly identical to those values obtained with liver microsomes from untreated and phenobarbital-treated rats. In addition, cytochrome P-450 beta NF-B and liver microsomes from beta-naphthoflavone-treated rats had nearly identical product ratios. Specific inhibitory antibodies to four purified isozymes were used to titrate the N-oxidase activity of liver microsomes from untreated, phenobarbital-, pregnenolone-16 alpha-carbonitrile-, or beta-naphthoflavone-treated rats. Anti-cytochrome P-450PB-C globulin inhibited more than 70 to 90% of the formation of N-isopropyl-alpha-(methyl-ONN-azoxy)-p-toluamide in microsomes from untreated, phenobarbital-, and pregnenolone-16 alpha-carbonitrile-treated rats, respectively, but only 20 to 50% of N-isopropyl-alpha-(methyl-NNO-azoxy)-p-toluamide formation. A small amount (25 to 30%) of inhibition was observed with anti-cytochrome P-450PB/PCN-E globulin. Anti-cytochrome P-450 beta NF-B globulin inhibited more than 85% of the synthesis of either azoxy isomer catalyzed by liver microsomes from beta-naphthoflavone-treated rats. These results demonstrate that two isozymes are responsible for the oxidative metabolism of azoprocarbazine and can account for the major portion of this N-oxidase activity in liver microsomes from untreated and phenobarbital-, pregnenolone-16 alpha-carbonitrile-, or beta-naphthoflavone-treated rats.
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Brown MI. An evaluation of API-20 STREP and isolation of Streptococcus milleri. J Clin Pathol 1982; 35:1297. [PMID: 6754764 PMCID: PMC497947 DOI: 10.1136/jcp.35.11.1297-a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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Carryer PW, Brown MI, Malagelada JR, Carlson GL, McCall JT. Quantification of the fate of dietary fiber in humans by a newly developed radiolabeled fiber marker. Gastroenterology 1982; 82:1389-94. [PMID: 6279467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
A radiolabeled cellulose (131I-fiber) that retains the essential physical and chemical properties of this class of fiber was developed in our laboratory. We quantified the fate of orally ingested 131I-fiber in healthy individuals by external gamma camera monitoring and fecal collections. The marker passes virtually intact through the human gastrointestinal tract with negligible release and absorption of the label in the gut. Comparison of the gastric emptying rate of 131I-fiber with that of a predominantly aqueous marker, 99mTc-diethylenetriamine pentaacetic acid (99mTc-DTPA), showed that 131I-fiber strands were evacuated more slowly than intragastric fluids. An important finding was that some 131I-fiber emptying occurred during most time periods, even before liquids were completely evacuated. This suggests that the human stomach is able to empty simultaneously liquids and fiber strands (1-15 mm in length) that are resistant to grinding by antral mechanical forces and to digestion by acid-peptic secretion. Thus, some nondigestible solids may be emptied with the bulk of a meal, although at a slower rate. 131I-Fiber may be a useful marker for quantifying gastric emptying of nondigestible solids. Further, the stability of 131I-fiber in the gut, as opposed to most other physiologic solid labels, should enable future investigation of intestinal and colonic transit of fiber, which is an important component of the human diet.
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Brown MI. "Bridging the barriers to understand" among residents, administrators and trustees of residences for the aged. Concern Care Aging 1977; 3:22-6. [PMID: 10305147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
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Brown MI. Critique of nurse-patient interchange in the arrestment of psychosocial atrophy of aged, institutionalized patients. Nurs Res Conf 1970; 6:33-7. [PMID: 5207327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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Brown MI. Patient variables associated with nurses' preferences among elderly patients. Nurs Res Conf 1969; 5:176-95. [PMID: 5207298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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Brown MI. Symposium on theory development in nursing. Social theory in geriatric nursing research. Nurs Res 1968; 17:213-7. [PMID: 5184898] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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