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Exploring the Reliability and Validity of the DAT-K in Grade 11 Learners in a Historically Disadvantaged School in Johannesburg, South Africa
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Sumaya Laher --- University of the Witswatersrand, South Africa M. Mokone --- University of the Witswatersrand, South AfricaThis study explored the reliability and validity of the Differential Aptitude Test—Form K (DAT-K) in a sample of 75 learners (mean age = 17.1 years, SD = 1.13) from a previously disadvantaged school in Johannesburg. Adequate reliability coefficients were obtained... -
Delegitimisation of Disliked Political Organisations Through Biased Language and Acronyming
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Tadios Chisango --- University of the Witwatersrand, South Africa Calvin Gwandure --- University of the Witwatersrand, South AfricaThe study investigated the use of biased language and acronyming in political organisations in South Africa and Zimbabwe. The study surveyed the discourses of political parties that were posted on the internet. Thematic content analysis was used to analyse the... -
The Optimism Bias: Is It Adaptive In Academic Settings?
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Caryl Ochse --- University of South Africa,This study investigated whether optimism was adaptive or maladaptive in an academic context. Participants were 715 psychology students with a large open and distance education university in South Africa (age range 20 to 61, average age 31 years, women =... -
Understanding self-appraisal of HIV-infection risk among young adults in Nigeria: evidence from a national survey
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Samson Babatunde Adebayo --- , Nigeria Jennifer Anyanti --- , Nigeria Augustine Ankomah --- , Kenya Godpower Omoregie --- , Nigeria Fatima Mamman-Daura --- , NigeriaA major component of HIV prevention is to encourage individuals to appreciate their personal risk of contracting the virus with the aim of encouraging them to take steps to reduce the risks. This article addresses the accuracy of an individual's... -
Estimating scavenger and search bias for collision fatality surveys of large birds on power lines in the Karoo, South Africa
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Maurice Schutgens --- DST/NRF Centre of Excellence at the Percy FitzPatrick Institute of African Ornithology, South Africa Jessica M Shaw --- DST/NRF Centre of Excellence at the Percy FitzPatrick Institute of African Ornithology, South Africa Peter G Ryan --- DST/NRF Centre of Excellence at the Percy FitzPatrick Institute of African Ornithology, South AfricaBird collision mortality associated with power lines is a global conservation challenge, but periodic carcass counts along power lines underestimate actual mortality because of survey biases. We conducted a scavenger trial over 90 days and three observer detection trials after... -
Psychometric evaluation of the Basic Traits Inventory in the multilingual South African environment
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Sonja Grobler --- Industrial and Organisational Psychology Department, College of Economic and Management Sciences, South Africa Marié de Beer --- Industrial and Organisational Psychology Department, College of Economic and Management Sciences, South AfricaThe objective of this study was to evaluate the psychometric properties of the BTI for all the official language groups in South Africa. Item bias analysis was performed by means of Rasch analysis for a sample of 105 342 respondents... -
An analysis of the recreational shore fishery in the Goukamma Marine Protected Area
Item type: Journal Article • Journal: African Zoology • Authors: P. Pradervand --- Oceanographic Research Institute, South Africa R. Hiseman --- Western Cape Nature Conservation Board, South AfricaTen years (1993–2002) of shore fishing catch and effort data collected during routine patrols in the Goukamma Marine Protected Area in theWestern Cape Province were analysed. Of a total of 35 species recorded, the most common were backtail, Diplodus sargus... -
Debiasing the curse of knowledge and audit judgement: Experience reconsidered
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: R Reeve --- Department of Accounting and Finance, Australia H Holmes --- Department of Accounting and Finance, Australia P Li --- Department of Accounting and Finance, Australia C Patel --- Department of Accounting and Finance, AustraliaThis study contributes to the research related to judgment biases in auditing by examining the extent to which relevant audit experience debiases (mitigates) the “curse of knowledge” (outcome knowledge bias} in audit judgements. Auditors, with a wide range of experience,... -
Debiasing the curse of knowledge and audit judgement: Experience reconsidered
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: R Reeve --- Department of Accounting and Finance, Australia H Holmes --- Department of Accounting and Finance, Australia P Li --- Department of Accounting and Finance, Australia C Patel --- Department of Accounting and Finance, AustraliaThis study contributes to the research related to judgment biases in auditing by examining the extent to which relevant audit experience debiases (mitigates) the “curse of knowledge” (outcome knowledge bias) in audit judgements. Auditors, with a wide range of experience,... -
The evolution of chondrichthyan research through a metadata analysis of dedicated international conferences between 1991 and 2014
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: C Huveneers --- School of Biological Sciences, Flinders University, Australia DA Ebert --- Pacific Shark Research Center, Moss Landing Marine Laboratories, USA SFJ Dudley --- Branch: Fisheries Management, Department of Agriculture, South AfricaScience is continually evolving, with recent developments in some fields, such as conservation biology, leading to shifts in priorities and needs. Recent international conferences focused on chondrichthyan research provide an opportunity to assess how the research environment of chondrichthyan science... -
Family versus individual plant selection for stem borer (Eldana saccharina) resistance in early stages of sugarcane breeding in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Marvellous Zhou --- South African Sugarcane Research Institute, South Africa Alfred Mokwele --- South African Sugarcane Research Institute, South AfricaEldana saccharina is an indigenous lepidopteran insect pest and the most damaging stem borer of sugarcane in southern Africa. Breeding for E. saccharina resistance in South Africa started in 1980 by crossing resistant parents (expected to possess resistance genes) and... -
Bird watching and estimation of bird diversity – not always corresponding: a reply to Hogg and Vande weghe
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Callixte Gatali --- Department of Wildlife and Aquatic Resources Management, Rwanda Kjell Wallin --- Department of Biological and Environmental Sciences, SwedenSome occurrences of rare or unusual bird species reported by us in a previous paper (Ostrich 86(3): 267–276, 2015) are considered to be doubtful by Hogg and Vande weghe (Ostrich 88(1): 83–88, 2017). We believe that some of the problems... -
The factor structure of the Social Axioms Survey II (SASII) in the South African context
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Adi Barnard --- Department Human Resource Management, Economic Management Science, South Africa Deon Meiring --- Department Human Resource Management, Economic Management Science, South Africa Ian Rothmann --- Optentia Research Focus Area, South AfricaThe objective of this study was to validate the new Social Axioms Survey II (SASII). The study sample comprised university students (n = 793) as well as their family members and friends (n = 645). Confirmatory factor analysis (CFA) following... -
Implicit Racial Bias in South Africa: How Far Have Manager-Employee Relations Come in ‘The Rainbow Nation’?
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Carin Bergh --- Department of Human Resource Management, South Africa Jenny M. Hoobler --- Department of Human Resource Management, South AfricaThis article examines manager-employee relations in democratic South Africa, using an unobtrusive, implicit measure of managers’ racial bias. We test the link between manager automatically activated evaluations of race labels with positive/negative words (implicit racial bias), and employees’ judgement of... -
Weight bias and eating behaviours of persons with overweight and obesity attending a general medical practice in Durban, South Africa
Item type: Journal Article • Journal: South African Family Practice • Authors: RD Govender --- Department of Family Medicine, United Arab Emirates S Al-Shamsi --- Department of Internal Medicine, United Arab Emirates D Regmi --- Department of Family Medicine, United Arab EmiratesBackground: The consequences of obesity for physical health and non-communicable illnesses are well established, but the impact on psychosocial well-being in persons with obesity is much less understood. This study aimed to assess psychosocial constructs such as weight bias affecting... -
The driving forces behind the home bias phenomenon: Evidence from Israel
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Sivan Riff --- University of Haifa, Israel Joseph Yagil --- University of Haifa and Western Galilee College, IsraelThe home bias phenomenon is a widely investigated puzzle that is still not completely resolved. Home bias is the tendency of investors to invest excessively in domestic assets, in contradiction to the traditional optimal portfolio theories. This research attempts to... -
A simplified approach to estimate the sustainable lifestyle level for retirement planning
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Elze-Mari Roux --- , South Africa Johann de Villiers --- , South AfricaIn this article we offer a simplified version of the alternative retirement planning model we originally proposed (De Villiers & Roux, 2019). Our method focuses on determining the sustainable lifestyle level (SLL) that an individual can currently afford while still... -
Fire as friend or foe: the role of scientists in balancing media coverage of fires in National Parks
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Izak PJ Smit --- , South Africa Marina Joubert --- , South Africa Kyle Smith --- , South Africa Nicola van Wilgen --- , South Africa Tercia Strydom --- , South Africa Johan Baard --- , South Africa Marna Herbst --- , South AfricaFire can destroy infrastructure and livelihoods, and claim lives. Yet, fire is inevitable and plays several vital ecological roles that have shaped ecosystems over millennia. Planned fires also serve human needs. Critical media content analysis of 390 media reports (print,... -
Influence of groups of points on estimates of the parameters of moult
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Les G Underhill --- University of Cape Town, South Africa Tanya Scott --- University of Cape Town, South AfricaThe Underhill–Zucchini model of avian moult is a statistical simplification for the analysis of primary moult, a complex biological system in birds. As with all such models, conclusions can be biased if a subset of the data used to fit... -
Biases in vulture conservation literature in Africa
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Joseph K Daniels --- University of Cape Coast, Ghana Samuel E Tamekloe --- University of Cape Coast, Ghana Kweku A Monney --- University of Cape Coast, Ghana Justus P Deikumah --- University of Cape Coast, GhanaSince the turn of the century, most vulture species have been experiencing dramatic population declines worldwide, prompting extensive research and conservation initiatives. We investigated research efforts on African vultures by searching for publications from the year 2000 to the present... -
The bias of IID resampled backtests for rolling window mean-variance portfolios
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Andrew Paskaramoorthy --- Department of Statistical Sciences, University of Cape Town, South Africa Terence van Zyl --- University of Johannesburg, South Africa Tim Gebbie --- Department of Statistical Sciences, University of Cape Town, South AfricaBacktests on historical data are fundamental for evaluating portfolio selection rules, but their reliability is often limited by reliance on a single sample path. This reliance can lead to high estimation variance. IID resampling offers a potential solution by increasing... -
Distribution and status of reptile species in south-eastern Zimbabwe
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Kurt M van Wyk --- University of the Western Cape, South Africa Bryan Maritz --- University of the Western Cape, South Africa Bruce W Clegg --- Malilangwe Trust, Malilangwe Wildlife Reserve, ZimbabweWhile the loss of biodiversity in response to anthropogenic drivers is well documented, reptiles are rarely prioritised in global conservation efforts. Although more than 20% of all reptile species are currently listed as threatened, and a growing body of evidence... -
The impact of ESG ratings on analysts’ information processing: Evidence from China
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Lin Li --- Central University of Finance and Economics, China Meng Chen --- Central University of Finance and Economics, China Guoping Li --- Central University of Finance and Economics, ChinaBased on data from Chinese A-share listed companies from 2009 to 2022, this study explores the relationship between ESG external ratings and analyst attention by quantifying the weight that analysts place on old information when releasing financial performance forecasts. The...