Development and initial validation of productive vocabulary tests for isiZulu, Siswati and English in South Africa

Multilingualism in education is encouraged in South Africa, and children are expected to become bilingual and biliterate during the early primary grades. Much focus has been placed on measuring literacy in children’s first language, often the medium of instruction (MOI), and English, the language typically used as MOI from fourth grade. However, vocabulary development in African contexts is underexplored, owing to the cost of existing English standardized tests, and the comparatively fewer linguistically and contextually appropriate vocabulary assessments in African languages. To address this gap, we document the development of corpus-informed contextually appropriate tests of productive vocabulary in isiZulu, Siswati, and English, which were used for a project evaluation. The initial validation phase included 412 children. Both tests were reliable and were concurrently validated with reading comprehension tests in each language, and oral language skills in English. This study contributes to our understanding of the factors that affect the variation in vocabulary knowledge in an African context, including age, grade repetition, and vocabulary in the other language. Only English vocabulary was affected by the remote rural location of the school. We recommend some modifications to the tests before they are validated further in other populations.

Development and Initial Validation of the Nonparticipation in Nonformal Education Questionnaire

Nonformal adult education (NFE) provides adults with the opportunity to obtain competences needed to adapt to today’s changing job market. Despite the well-documented positive effects of NFE, there remains a lack of valid research instruments to assess factors of nonparticipation. Specifically, defining the perspectives of social groups with the highest incidence of barriers and the lowest level of participation in NFE has not been a primary research goal. This study describes the development and initial validation of a novel research tool entitled the Nonparticipation in Nonformal Education Questionnaire (NP-NFE-Q). The analysis covers the use of the NP-NFE-Q on a representative sample of the adult population ( n = 878) as well as three additional cohorts: low-educated workers ( n = 227), persons caring for children under the age of three ( n = 227), and retired persons ( n = 232). The results consistently support the validation of a correlated five-factor model, which includes two situational, one institutional and two dispositional factors.

PDSTD - The Portsmouth Dynamic Spontaneous Tears Database

The vast majority of research on human emotional tears has relied on posed and static stimulus materials. In this paper, we introduce the Portsmouth Dynamic Spontaneous Tears Database (PDSTD), a free resource comprising video recordings of 24 female encoders depicting a balanced representation of sadness stimuli with and without tears. Encoders watched a neutral film and a self-selected sad film and reported their emotional experience for 9 emotions. Extending this initial validation, we obtained norming data from an independent sample of naïve observers (N = 91, 45 females) who watched videos of the encoders during three time phases (neutral, pre-sadness, sadness), yielding a total of 72 validated recordings. Observers rated the expressions during each phase on 7 discrete emotions, negative and positive valence, arousal, and genuineness. All data were analyzed by means of general linear mixed modelling (GLMM) to account for sources of random variance. Our results confirm the successful elicitation of sadness, and demonstrate the presence of a tear effect, i.e., a substantial increase in perceived sadness for spontaneous dynamic weeping. To our knowledge, the PDSTD is the first database of spontaneously elicited dynamic tears and sadness that is openly available to researchers. The stimuli can be accessed free of charge via OSF from https://osf.io/uyjeg/?view_only=24474ec8d75949ccb9a8243651db0abf.

Search in a Redecentralised Web

Search has been central to the development of the Web, enabling increasing engagement by a growing number of users. Proposals for the redecentalisation of the Web such as SOLID aim to give individuals sovereignty over their data by means of personal online datastores (pods). However, it is not clear whether search utilities that we currently take for granted would work efficiently in a redecentralised Web. In this paper we discuss the challenges of supporting distributed search on a large scale of pods. We present a system architecture which can allow research, development and testing of new algorithms for decentralised search across pods. We undertake an initial validation of this architecture by usage scenarios for decentralised search under user-defined access control and data governance constraints. We conclude with research directions for decentralised search algorithms and deployment.